TWI841047B - Transparent display apparatus - Google Patents

Abstract

A transparent display device is provided in which light efficiency and/or transmittance are improved. A transparent display device includes a substrate provided with a plurality of pixels having a transmissive portion and a plurality of light emitting portions emitting light of different colors, and a non-transmissive portion disposed between the transmissive portion and the plurality of light emitting portions and between the plurality of light emitting portions. a plurality of light-emitting parts on the substrate, wherein each of the plurality of light-emitting parts includes sub-light-emitting parts having the same shape and size and spaced apart from each other, and the non-transmissive portion comprises a shared non-transmissive portion and a non-shared non-transmissive portion.

Description

Transparent display device

This disclosure relates to a transparent display device.

With the development of information-oriented society, the demand for various types of display devices for displaying images has also increased. Recently, various types of display devices have been widely used, such as liquid crystal display (LCD) devices, plasma display panel (PDP) devices, organic light emitting display (OLED) devices, and quantum dot light emitting display (QLED) devices.

Recently, research on transparent display devices in which a user can view an object or image located on the opposite side through a transmitting display device is being actively conducted.

The transparent display device may include a display area in a substrate, an image is displayed on the display area, and the display area may include a light-transmitting area capable of transmitting external light and a light-impermeable area that does not transmit light. The light-impermeable area may include a light-emitting area that emits light, and a non-light-emitting area disposed between the light-transmitting area and the light-emitting area.

The size of the luminous area and the light-transmitting area in a substrate with a limited size has a trade-off relationship. Therefore, when the size of the luminous area increases, the size of the light-transmitting portion decreases, and when the size of the light-transmitting portion increases, the size of the luminous area decreases. That is, when the luminous efficiency is improved, the transmittance decreases, and when the transmittance is improved, the luminous efficiency decreases. Therefore, it is necessary to study a transparent display device that can improve the luminous efficiency and/or transmittance by minimizing the size of the non-luminous area.

In view of the above problems, this disclosure is made, and the purpose of this disclosure is to provide a transparent display device with improved luminous efficiency and/or light transmittance.

In addition to the above-mentioned technical effects of this disclosure, a person with ordinary knowledge in this field will be able to understand the other technical effects and features of this disclosure based on the following description of this disclosure.

According to one aspect of the present disclosure, the above and other purposes can be achieved by providing a transparent display device, which includes a substrate provided with a plurality of pixels, wherein the plurality of pixels have a light-transmitting portion and a plurality of light-emitting portions emitting different lights. A light-proof portion is provided between the light-transmitting portion and the plurality of light-emitting portions and between the plurality of light-emitting portions on the substrate, wherein each of the plurality of light-emitting portions includes a first sub-light-emitting portion and a second sub-light-emitting portion having the same shape and size and spaced apart from each other, and the light-proof portion includes a first light-proof portion adjacent to each short side of the first sub-light-emitting portion and the second sub-light-emitting portion arranged in a first direction, and a second light-proof portion adjacent to a long side arranged in a second direction intersecting the first direction. The short sides of the first sub-light-emitting portion and the second sub-light-emitting portion include a first short side connected to the long side and a second short side connected to the other side. The long side of the first sub-light-emitting unit includes a first long side connecting one side of the first short side of the first sub-light-emitting unit and one side of the second short side of the first sub-light-emitting unit, and a second long side connecting the other side of the first short side of the first sub-light-emitting unit and the other side of the second short side of the first sub-light-emitting unit. The long side of the second sub-light-emitting unit includes a first long side connecting one side of the first short side of the second sub-light-emitting unit and one side of the second short side of the second sub-light-emitting unit, and a second long side connecting the other side of the first short side of the second sub-light-emitting unit and the other side of the second short side of the second sub-light-emitting unit. The first light-impermeable portion and the second light-impermeable portion are provided to satisfy A:2B=(a+b):( c + d + e ), wherein A is the length of the long side of the first sub-light-emitting portion, B is the length of the short side of the first sub-light-emitting portion, a is the length of the first light-impermeable portion adjacent to the first short side of the first sub-light-emitting portion in the second direction, b is the length of the first light-impermeable portion adjacent to the second short side of the first sub-light-emitting portion in the second direction, c is the length of the second light-impermeable portion adjacent to the first long side of the first sub-light-emitting portion in the first direction, d is the length of the second light-impermeable portion adjacent to the second long side of the first sub-light-emitting portion or the first long side of the second sub-light-emitting portion in the first direction, and e is the length of the second light-impermeable portion adjacent to the second long side of the second sub-light-emitting portion in the first direction.

According to another aspect of the present disclosure, the above and other purposes can be achieved by providing a transparent display device, the transparent display device includes a substrate provided with multiple pixels, the multiple pixels have a light-transmitting portion and multiple light-emitting portions, and a non-light-transmitting portion is provided between the light-transmitting portion and the multiple light-emitting portions and between the multiple light-emitting portions on the substrate, wherein each light-emitting portion includes multiple first light-emitting sides and multiple second light-emitting sides provided in parallel. The light-emitting surfaces are respectively connected to the first light-emitting surfaces, the light-impermeable portion includes multiple first light-impermeable portions respectively adjacent to the first light-emitting surfaces and multiple second light-impermeable portions respectively adjacent to the second light-emitting surfaces, and the ratio of the length of each first light-emitting side to each second light-emitting side is equal to the ratio of the total length of the second light-impermeable portion to the total length of the first light-impermeable portion.

100: Transparent display device

110: Substrate

111: Inorganic layer

111a: Gate insulation layer

111b: Interlayer insulation layer

111c: Passivation layer/protective layer

112: Driving transistor

112a: Active layer

112b: Gate electrode

112c: Source electrode

112d: Drain electrode

113: Planarization layer

114: First electrode

115: Bank

116: Organic luminescent layer

117: Second electrode

118: Packaging layer

119:Filter

120: Opposite substrate

130: Source drive integrated circuit

140: Flexible membrane

150: Circuit board

160: Timing controller

A,a,B,b,c,d,e:length

AL: Adhesive layer

BL: Buffer layer

BM: Black Matrix

CNT: Sub-electrode contact part

DA: Display Area

DL1~DL4: Data line

EA, EA1~EA4-2: Luminous area

GD: Gate driver

LS: Light-shielding layer

NDA, NDA1~4: non-display area

NNTA: Non-shared light-proof part

NTA: Non-transparent part

P~P9: Pixels

PA: pad area

REFL: Reference line

SCANL: Scan line

SE~SE4: Sub-electrode

SL1: First signal line

SL2: Second signal line

SNTA: opaque part

SP, SP1~SP4: Light-emitting part

SP1W~SP3W: Width

STA: Sub-transparent part

STAW: scheduled width

TA1: light-transmitting part

TR1~TR4: Transistor

SL1,SL2:Signal line

UC: Undercut

VDD: pixel power short circuit bar

VDDL: Pixel power line

VSS: common power short circuit bar

VSSL: common power line

W1-1~2-2: Width

The above and other purposes, features and other advantages of the present disclosure will be more clearly understood from the detailed description of the following combined drawings, wherein: FIG. 1 is a top view of a transparent display device showing an embodiment of the present disclosure; FIG. 2 is an enlarged schematic diagram of part F of FIG. 1; FIG. 3 is an enlarged schematic diagram of part G of FIG. 1; FIG. 4 is a diagram showing various configuration examples of a color light-emitting portion for minimizing the size of the opaque portion; FIG. 5 is an enlarged schematic diagram of part H of FIG. 4; FIG. 6 is an enlarged schematic diagram of part J of FIG. 5; FIG. 7 is a diagram showing an example of configuring a plurality of signal lines and a plurality of drive transistors; FIG. 8 is a cross-sectional view taken along line II-I' shown in FIG. 7; FIG. 9 is a cross-sectional view taken along line II-II' shown in FIG. 8; FIG. 10 is a top view showing an example of configuring the sub-electrode contact portion in a sawtooth shape.

Reference will now be made in detail to embodiments of the present disclosure, examples of which are shown in the accompanying drawings.

In any case, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

The advantages and features of the present disclosure and its implementation method will be more clearly understood through the following embodiments described in conjunction with the accompanying drawings.

However, the present disclosure may be implemented in different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those having ordinary knowledge in the art.

The shapes, sizes, proportions, angles, and quantities shown in the drawings used to describe embodiments of the present disclosure are examples only, and thus, the present disclosure is not limited to the details shown.

The same figure reference numerals refer to the same elements throughout. In the following description, when the detailed description of the related known functions or configurations is determined to unnecessarily obscure the key points of the present disclosure, the detailed description will be omitted.

Where "includes", "has" and "comprising" are used in this specification, other parts may be added unless "only" is used. Unless otherwise specified, terms in the singular form may include plural forms.

When explaining a component, even if it is not explicitly stated, the component is understood to include a range of error.

When describing positional relationships, for example, when positional relationships are described as "at", "above", "below" and "beside", one or more parts can be placed between two other parts, unless "only" or "directly" is used.

When describing temporal relationships, for example, when temporal sequences are described as "successor," "after," "next," and "before," discontinuities can be included unless "only" or "directly" is used.

It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms.

These terms are only used to distinguish one element from another. For example, a first element can be referred to as a second element, and similarly, a second element can be referred to as a first element without departing from the scope of the present disclosure.

"X-axis direction", "Y-axis direction" and "Z-axis direction" should not be understood as geometric relationships of perpendicularity to each other, but can have a wider range of directional functions within the scope of the elements of this disclosure.

The term "at least one" should be understood to include any and all combinations of one or more of the relevant listed items. For example, "at least one of the first, second and third items" means all combinations of two or more of the first, second and third items, as well as the first, second or third item.

As can be fully understood by those with ordinary knowledge in the art, the features of the various embodiments of the present disclosure can be coupled or combined with each other in part or in whole, and can interoperate with each other in various ways and be technically driven.

The embodiments disclosed herein can be implemented independently of each other or can be implemented together in an interdependent relationship.

Hereinafter, the preferred embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

FIG. 1 is a top view of a transparent display device according to an embodiment of the present disclosure; FIG. 2 is an enlarged schematic diagram of part F of FIG. 1 ; FIG. 3 is an enlarged schematic diagram of part G of FIG. 1 ; FIG. 4 is a diagram showing various configuration examples of a color light-emitting portion for minimizing the size of a light-impermeable portion; FIG. 5 is an enlarged schematic diagram of part H of FIG. 4 ; and FIG. 6 is an enlarged schematic diagram of part J of FIG. 5 .

In the following, the X-axis represents the direction parallel to the gate line, the Y-axis represents the direction parallel to the data line, and the Z-axis represents the direction of the thickness of the transparent display device 100.

The following description will be based on the transparent display device 100 according to an embodiment of the present disclosure being an organic light-emitting display device, but is not limited thereto. That is, the transparent display device according to an embodiment of the present disclosure can be implemented as a liquid crystal display device, a plasma display panel device, an organic light-emitting display device, and a quantum dot light-emitting display device.

1 to 6, a transparent display device 100 according to an embodiment of the present disclosure may include a display panel having a gate driver GD, a source driver integrated circuit (hereinafter referred to as IC) 130, a flexible film 140, a circuit board 150, and a timing controller 160.

The display panel may include a substrate 110 and an opposing substrate 120 bonded to each other (as shown in FIG. 8 ).

The substrate 110 may include a thin film transistor and may be a transistor array substrate, a lower substrate, a base substrate, or a first substrate. The substrate 110 may be a transparent glass substrate or a transparent plastic substrate. Hereinafter, the substrate 110 will be defined as a first substrate.

The counter substrate 120 may be bonded to the first substrate 110 via an adhesive member. For example, the counter substrate 120 may be smaller than the first substrate 110 and may be bonded to the remaining portion of the first substrate 110 except for the pad area. The counter substrate 120 may be an upper substrate, a second substrate, or a packaging substrate. The substrate 120 is defined as the second substrate below.

The gate driver GD provides a gate signal to the gate line according to a gate control signal input from the timing controller 160. When the source driver IC 130 is manufactured as a driver chip, the source driver IC 130 can be packaged in the flexible film 140 by a chip on film (COF) method or a chip on plastic (COP) method.

Pads such as power pads and data pads may be formed in a non-display area of the display panel. The flexible film 140 may include a line connecting the pad to the source driver IC 130 and a line connecting the pad to the circuit board 150. The flexible film 140 may be attached to the pad by using an anisotropic conductive film, whereby the pad may be connected to the line of the flexible film 140.

Referring to FIG. 1 , the first substrate 110 according to an embodiment of the present disclosure may include a display area DA and a non-display area NDA.

The display area DA is the area where the image is displayed, which may be a pixel array area, an active area, a pixel array unit, a display unit or a screen. For example, the display area DA may be set in the center portion of the display panel.

According to an embodiment of the present disclosure, the display area DA may include a gate line, a data line, a pixel drive power line, and a plurality of pixels P (as shown in FIG. 2 ). Each of the pixels P may include a plurality of light-emitting portions SP defined by the gate line and the data line, and a light-transmitting portion TA1 disposed adjacent to some or all of the light-emitting portions SP. The light-transmitting portion TA1 is an area disposed to allow light to pass through the front and rear surfaces of the display panel. Therefore, a user located in the front surface direction of the display panel can view an image or background located in the rear surface direction of the display panel through the light-transmitting portion TA1.

Each of these light-emitting portions SP can be defined as the minimum unit area of actual light emission.

According to an embodiment of the present disclosure, among the light-emitting parts SP, at least four light-emitting parts that are arranged to emit light of different colors and are located adjacent to each other and one light-transmitting part TA1 constitute a unit pixel P. One light-transmitting part TA1 included in the unit pixel may be arranged to be divided into a plurality of regions. One unit pixel may include, but is not limited to, a red light-emitting part, a green light-emitting part, a blue light-emitting part, a white light-emitting part, and a light-transmitting part TA1. According to another example, three light-emitting parts SP that are arranged to emit light of different colors and are located adjacent to each other and one light-transmitting part TA1 among the light-emitting parts SP constitute a unit pixel. One unit pixel may include, but is not limited to, at least one red light-emitting part, at least one green light-emitting part, at least one blue light-emitting part, and one light-transmitting part TA1.

Each of the light-emitting parts SP may include a thin film transistor and a light-emitting element connected to the thin film transistor. The light-emitting part may include a light-emitting layer (or an organic light-emitting layer) inserted between a first electrode and a second electrode.

The light-emitting layers provided in each of the light-emitting parts SP may emit light of different colors individually, or may emit white light together. According to an embodiment of the present disclosure, when the light-emitting layers of each of the light-emitting parts SP emit white light together, each of the red light-emitting part, the green light-emitting part, and the blue light-emitting part may include a filter (or a wavelength conversion element) for converting white light into light of different colors. In this case, the white light-emitting part according to an embodiment of the present disclosure may not include a filter. In the transparent display device 100 according to an embodiment of the present disclosure, the area provided with a red filter may be a red light emitting portion SP1, the area provided with a green filter may be a green light emitting portion SP2, the area provided with a blue filter may be a blue light emitting portion SP3, and the area without a filter may be a white light emitting portion SP4. In the present disclosure, the red light emitting portion SP1 may be represented as a first light emitting portion configured to emit red light, the green light emitting portion SP2 may be represented as a second light emitting portion configured to emit green light, the blue light emitting portion SP3 may be represented as a third light emitting portion configured to emit blue light, and the white light emitting portion SP4 may be represented as a fourth light emitting portion configured to emit white light.

When a gate signal is input from a gate line by using a thin film transistor, each of the light-emitting parts SP provides a predetermined current to the organic light-emitting element according to the data voltage of the data line. For this reason, the light-emitting layer of each light-emitting part can emit light with a predetermined brightness according to the predetermined current.

Each of the light-emitting portions SP that emit light of different colors may include two sub-light-emitting portions, such as a first sub-light-emitting portion and a second sub-light-emitting portion, the first sub-light-emitting portion and the second sub-light-emitting portion having the same shape and size, and spaced apart from each other as shown in the figure. The structure of each light-emitting portion SP will be described later with reference to FIG. 7.

As shown in FIG. 2 , the display area DA includes a light-transmitting portion TA1 and a light-impermeable portion NTA. The light-transmitting portion TA1 is a region through which most of the light incident from the outside passes, and the light-impermeable portion NTA is a region through which most of the light incident from the outside does not pass.

The opaque portion NTA may be provided with the pixels P, and a plurality of first signal lines SL1 and second signal lines SL2 for providing signals to the pixels P respectively.

The first signal lines SL1 may extend in the second direction (X-axis direction). Each of the first signal lines SL1 may include at least one scanning line.

Hereinafter, when the first signal line SL1 includes a plurality of lines, one of the first signal lines SL1 may refer to a signal line group including the plurality of lines. For example, when the first signal line SL1 includes two scanning lines, one of the first signal lines SL1 may refer to a signal line group including the two scanning lines.

The second signal lines SL2 may extend in the first direction (Y-axis direction). The second signal lines SL2 may cross the first signal lines SL1. Each of the second signal lines SL2 may include a pixel power line VDDL and a common power line VSSL. In one embodiment, each of the second signal lines SL2 may further include a first data line DL1, a reference line REFL, a second data line DL2, a third data line DL3, and a fourth data line DL4.

Hereinafter, when the second signal line SL2 includes a plurality of lines, one second signal line SL2 may refer to a signal line group including the plurality of lines. For example, when the second signal line SL2 includes four data lines, a pixel power line, a common power line, and a reference line, one second signal line SL2 may refer to a signal line group including four data lines, a pixel power line, a common power line, and a reference line.

At least one transparent portion TA1 may be disposed between adjacent first signal lines SL1. In addition, at least one transparent portion TA1 may be disposed between adjacent second signal lines SL2. That is, the transparent portion TA1 may be surrounded by two first signal lines SL1 and two second signal lines SL2.

The non-display area NDA is an area where no image is displayed, and may be a peripheral circuit area, a signal supply area, a non-active area, or a border area. The non-display area NDA may be configured to be near the display area DA. In other words, the non-display area NDA may be set to surround the display area DA.

In a transparent display device 100 according to an embodiment of the present disclosure, a pad area PA may be disposed in a non-display area NDA. The pad area PA may provide power and/or signals for outputting images to pixels P disposed in the display area DA. The non-display area NDA may include a first non-display area NDA1, a second non-display area NDA2, a third non-display area NDA3, and a fourth non-display area NDA4. The area in which the pad area PA is provided may be the first non-display area NDA1.

The gate driver GD provides a gate signal to the gate line according to the gate control signal input from the timing controller 160. The gate driver GD may be formed on one side of the display area DA of the display panel or in the non-display area NDA outside both sides of the display area DA in the gate-in-plane (GIP) method as shown in FIG. 1. Alternatively, the gate driver GD may be made into a driver chip, packaged in a flexible film, and attached to one side of the display area DA of the display panel or outside both sides of the non-display area NDA by a tape automated bonding method (TAB).

The gate drivers GD may be separately arranged on the left side of the display area DA, i.e., the second non-display area NDA2, and on the right side of the display area DA, i.e., the third non-display area NDA3. According to an embodiment of the present disclosure, the gate drivers GD may be connected to the pixels P and the first signal lines SL1 for providing signals to the pixels P. The first signal lines SL1 may include at least one signal line for providing a signal for driving the pixels P.

The second signal lines SL2 may extend in the first direction (Y-axis direction). The second signal lines SL2 may cross the first signal lines SL1. The second signal lines may include a pixel power line VDDL and at least one data line for providing a data voltage to the pixel P. Each of the second signal lines SL2 may be connected to at least one of a plurality of pads, a pixel power shorting bar VDD, or a common power shorting bar VSS. The pixel power shorting bar VDD and the common power shorting bar VSS may be disposed in a fourth non-display area NDA4, and the fourth non-display area NDA4 is disposed to face the pad area PA based on the display area DA.

The pixel is set to overlap with at least one of the first signal line SL1 or the second signal line SL2 and emits a predetermined light to display an image. The light-emitting area EA may correspond to the light-emitting area in the pixel P.

Each pixel P may include at least one of a red light emitting portion SP1 (or EA1), a green light emitting portion SP2 (or EA2), a blue light emitting portion SP3 (or EA3), or a white light emitting portion SP4 (or EA4). The red light emitting portion SP1 may include a first light emitting area EA1 emitting red light, the green light emitting portion SP2 may include a second light emitting area EA2 emitting green light, the blue light emitting portion SP3 may include a third light emitting area EA3 emitting blue light, and the white light emitting portion SP4 may include a fourth light emitting area EA4 emitting white light, but the present disclosure is not limited thereto. Each pixel P may include a light emitting portion that emits light of a color other than red, green, blue, and white. In addition, various modifications may be made to the arrangement order of the light emitting portions SP1, SP2, SP3, and SP4.

The red light emitting portion SP1, the green light emitting portion SP2, the blue light emitting portion SP3 and the white light emitting portion SP4 may be provided with at least one sub-light emitting portion (or light emitting area). One or more sub-light emitting portions of each light emitting portion SP1, SP2, SP3 and SP4 may have the same shape and size. For example, as shown in FIG5, the red light emitting portion SP1 (or EA1) may include a first red sub-light emitting portion EA1-1 and a second red sub-light emitting portion EA1-2 spaced apart from each other in a first direction (Y-axis direction). The green light emitting portion SP2 (or EA2) may include a first green sub-light emitting portion EA2-1 and a second green sub-light emitting portion EA2-2 spaced apart from each other in a first direction (Y-axis direction). The blue light emitting portion SP3 (or EA3) may include a first blue sub-light emitting portion EA3-1 and a second blue sub-light emitting portion EA3-2 spaced apart from each other in a first direction (Y-axis direction). White light emitting portion SP4 (or EA4) may include a first white sub-light emitting portion EA4-1 and a second white sub-light emitting portion EA4-2 separated from each other in the second direction (X-axis direction). The reason why each light emitting portion includes two sub-light emitting portions (or light emitting regions) as described above is that when a light emitting portion (or light emitting region) includes only one sub-light emitting portion, when particles are deposited on the light emitting portion during the manufacturing process, the entire light emitting portion cannot emit light due to a short circuit caused by the particles. Therefore, in a transparent display device 100 according to an embodiment of the present disclosure, a light emitting portion and a plurality of sub-light emitting portions (or light emitting regions) are connected to a driving transistor through each of a plurality of repair lines R (as shown in FIG. 5), so that when a defect occurs, the repair line connected to the light emitting region where the defect occurs can be cut off, whereby another light emitting region can emit light to improve the light emitting efficiency. For example, two red sub-light-emitting units EA1-1 and EA1-2 can be connected to a driving transistor disposed in a red light-emitting unit SP1 through a first repair line R1. Two green sub-light-emitting units EA2-1 and EA2-2 can be connected to a driving transistor disposed in a green light-emitting unit SP2 through a second repair line R2. Two blue sub-light-emitting units EA3-1 and EA3-2 can be connected to a driving transistor disposed in a blue light-emitting unit SP3 through a third repair line R3. Two white sub-light-emitting units EA4-1 and EA4-2 can be connected to a driving transistor disposed in a white light-emitting unit SP4 through a fourth repair line R4. As shown in FIG. 5, at least a portion of each of the repair lines R1, R2, R3, and R4 can be disposed in the light-transmitting unit TA1.

Referring back to FIG. 2 and FIG. 3, in the transparent display device 100 according to an embodiment of the present disclosure, the non-light-transmitting portion NTA may be disposed between the light-transmitting portion TA1 and the light-emitting portions SP1, SP2, SP3, and SP4 and between the light-emitting portions SP1, SP2, SP3, and SP4 on the first substrate 110. Since each of the light-emitting portions includes a first sub-light-emitting portion and a second sub-light-emitting portion, the non-light-transmitting portion NTA may be disposed between the light-transmitting portion TA1 and the first sub-light-emitting portion, between the light-transmitting portion TA1 and the second sub-light-emitting portion, and between the first sub-light-emitting portion and the second sub-light-emitting portion.

The non-transparent portion NTA may refer to an area that is set in the display area DA and does not emit light, and may be represented as a dead zone because it does not emit light. The dead zone according to an example may be an area where a black matrix and/or a bank is set, but is not limited thereto, and may refer to an area that does not emit light.

The light-proof portion NTA may include a first light-proof portion NTA1 adjacent to the short side of each of the light-emitting portions EA1 (or light-emitting areas) and a second light-proof portion NTA2 adjacent to the short side of each of the light-emitting portions EA1 (or light-emitting areas). The long side of each light-emitting portion EA1 (or light-emitting area). The first light-proof portion NTA1 may be arranged to be adjacent to the short side arranged in the first direction (Y-axis direction) in each of the first sub-light-emitting portion and the second sub-light-emitting portion. The second light-proof portion NTA2 may be arranged to be adjacent to the long side arranged in the second direction (X-axis direction) intersecting the first direction (Y-axis direction).

The short side L1 of each of the first sub-light-emitting portion and the second sub-light-emitting portion may include a first short side L1-1 connected to one side of the long side of each of the first sub-light-emitting portion and a second short side L1-2 connected to the other side of the long side of each of the first sub-light-emitting portion and the second sub-light-emitting portion. In this case, one side of the long side of each of the first sub-light-emitting portion and the second sub-light-emitting portion may refer to the left direction based on the second direction (X-axis direction) of FIG. 3. The other side of the long side of the first sub-light-emitting portion and the second sub-light-emitting portion may refer to the right direction based on the second direction (X-axis direction) of FIG. 3.

The long side of the first sub-light-emitting portion may include a first long side L2-1 connecting one side of the first short side L1-1 of the first sub-light-emitting portion and one side of the second short side L1-, and a second long side L2-2 connecting the other side of the first short side L1-1 of the first sub-light-emitting portion and the other side of the second short side L1-. The long side of the second sub-light-emitting portion may include a first long side L2-1 connecting one side of the first short side L1-1 of the second sub-light-emitting portion and one side of the second short side L1-, and a second long side L2-2 connecting the other side of the first short side L1-1 of the second sub-light-emitting portion and the other side of the second short side L1-2. In this case, one side of the short side of each of the first sub-light-emitting portion and the second sub-light-emitting portion may refer to the upper side based on the first direction (Y-axis direction) of FIG. 3. The other side of the short side of each of the first sub-light-emitting portion and the second sub-light-emitting portion may refer to the lower direction based on the first direction (Y-axis direction) of FIG. 3.

In more detail, the red light emitting portion SP1 in FIG. 3 is used as an example for explanation. The first light-proof portion NTA1 may include a first left light-proof portion NTA1-1 adjacent to the first short side L1-1 of the first red sub-light emitting portion EA1-1, a second right light-proof portion NTA1-2 adjacent to the second short side L1-2 of the first red sub-light emitting portion EA1-1, a third left light-proof portion NTA1-3 adjacent to the first short side L1-1 of the second red sub-light emitting portion EA1-2, and a fourth right light-proof portion NTA1-4 adjacent to the second short side L1-2 of the second red sub-light emitting portion EA1-2.

The second light-proof portion NTA2 may include a first upper light-proof portion NTA2-1 adjacent to the first long side L2-1 of the first red sub-light-emitting portion EA1-1, a second lower light-proof portion adjacent to the second long side L2-2 of the first red sub-light-emitting portion EA1-1, a third upper light-proof portion adjacent to the first long side L2-1 of the second red sub-light-emitting portion EA1-2, and a fourth lower light-proof portion NTA2-3 adjacent to the second long side L2-2 of the second red sub-light-emitting portion EA1-2. The second lower light-proof portion adjacent to the second long side L2-2 of the first red sub-light emitting portion EA1-1 and the third upper light-proof portion adjacent to the first long side L2-1 of the second red light emitting portion EA2-1 can be arranged to contact each other between the first red sub-light emitting portion EA1-1 and the second red sub-light emitting portion EA1-2 to form an area, and thus can be represented as the middle light-proof portion NTA2-2.

In the transparent display device 100 according to an embodiment of the present disclosure, a first light-proof portion NTA1 and a second light-proof portion NTA2 may be provided to satisfy the following equation.

A: 2B = (a + b): ( c + d + e )

In the above formula, A may be the length EA1-1 of the first long side L2-1 of the first red sub-light-emitting portion, for example. B may be the length of the first short side L1-1 of the first sub-light-emitting portion, for example, the first red sub-light-emitting portion EA1-1. a may refer to the length of the first light-proof portion NTA1 adjacent to the first short side of the first sub-light-emitting portion in the second direction (X-axis direction). b may be the length of the first light-proof portion NTA1 adjacent to the second short side L1-2 of the first sub-light-emitting portion in the second direction (X-axis direction). For example, b may be the length of the second right-side light-proof portion NTA1-2 adjacent to the second short side L1-2 of the first red sub-light-emitting portion EA1-1 in the second direction (X-axis direction). c may be the length of the second light-proof portion NTA2 adjacent to the first long side of the first sub-light-emitting portion in the first direction (Y-axis direction). For example, c may be the length of the first upper light-proof portion NTA2-1 adjacent to the first long side L2-1 of the first red sub-light-emitting portion EA1-1 in the first direction (Y-axis direction). d may be the length of the second light-proof portion adjacent to the second long side of the first sub-light-emitting portion or the first long side of the second sub-light-emitting portion in the first direction. For example, d may be the second lower light-proof portion adjacent to the second long side L2-2 of the first red sub-light-emitting portion EA1-1 in the first direction (Y-axis direction). Alternatively, d may be the length of the third upper light-proof portion adjacent to the first long side L2-1 of the second red sub-light-emitting portion EA1-2 in the first direction (Y-axis direction). Alternatively, d may be the length of the middle light-proof portion NTA2-2 in the first direction (Y-axis direction). e may be the length of the second light-proof portion adjacent to the second long side of the second sub-light-emitting portion in the first direction. For example, e can be the length of the fourth lower light-impermeable portion NTA2-3 adjacent to the second long side L2-2 of the second red sub-light-emitting portion EA1-2 in the first direction (Y-axis direction).

In the transparent display device 100 according to an embodiment of the present disclosure, since the first light-proof part NTA1 and the second light-proof part NTA2 are provided to satisfy the same equation as A:2B=(a+b):( c + d + e ), the size of the blind area can be minimized, thereby increasing the size of the light-emitting part or providing an additional light-transmitting part (or sub-light-transmitting part). Therefore, the transparent display device 100 according to an embodiment of the present disclosure can improve the light-emitting efficiency and/or light transmittance.

The above formula can be expressed as a formula related to the area of each of the first light-proof part NTA1 and the second light-proof part NTA2. For example, in the transparent display device 100 according to an embodiment of the present disclosure, the area of the first light-proof part NTA1 can be equal to the area of the second light-proof part NTA2. That is, the sum of the areas of the first left light-proof part NTA1-1, the second right light-proof part NTA1-2, the third left light-proof part NTA1-3 and the fourth right light-proof part NTA1-4 can be equal to the sum of the areas of the first upper light-proof part NTA2-1, the middle light-proof part NTA2-2 and the fourth lower light-proof part NTA2-3. This is to minimize the size (or area) of the non-transparent part NTA, that is, the size (or area) of the blind area relative to the light-emitting part (or light-emitting area).

In order to minimize the size (or area) of the opaque portion NTA of the light-emitting portion (or light-emitting area), that is, the size (or area) of the blind area, the area of the light-emitting portion (or light-emitting area) and the area of the opaque portion NTA adjacent to the light-emitting portion can be set to satisfy a relationship such as (a+b)*(2B)=A*(c+d+e). Referring to Figure 3, a may refer to the length of the first left opaque portion NTA1-1 or the third left opaque portion NTA1-3 in the second direction (X-axis direction). b may refer to the length of the second right opaque portion NTA1-2 or the fourth right opaque portion NTA1-4 in the second direction (X-axis direction). c may refer to the length of the first upper opaque portion NTA2-1 in the first direction (Y-axis direction). d may refer to the length of the middle opaque portion NTA2-2 in the first direction (Y-axis direction). e may refer to the length of the fourth lower opaque portion NTA2-3 in the first direction (Y-axis direction). A may refer to the length of the first red sub-light-emitting portion EA1-1 or the second red sub-light-emitting portion EA1-2 in the second direction (X-axis direction). B may refer to the length of the first red sub-light-emitting portion EA1-1 or the second red sub-light-emitting portion EA1-2 in the first direction (Y-axis direction). Referring to FIG. 3, A may be the length of the long side L2 (or the second light-emitting side) of the first red sub-light-emitting portion EA1-1 or the second red sub-light-emitting portion EA1-2, and B may be the length of the short side L1 (or the first light-emitting side) of the first red sub-light-emitting portion EA1-1 or the second red sub-light-emitting portion EA1-2. The length may be expressed as any one of width, height, thickness, horizontal length, and vertical length.

According to the above formula, the area of the first light-impermeable part NTA1, for example, the first left light-impermeable part NTA1-1, the second right light-impermeable part NTA1-2, the third left light-impermeable part NTA1-3 and the right fourth light-impermeable part NTA1-4 can be the area of the second light-impermeable part NTA2, for example, the sum of the areas of the first upper light-impermeable part NTA2-1, the middle light-impermeable part NTA2-2 and the fourth lower light-impermeable part NTA2-3.

In the transparent display device 100 according to an embodiment of the present disclosure, the opaque portion NTA can be set to a minimum size through the above formula, thereby increasing the size of the light-emitting portion (or light-emitting area) and/or the light-transmitting portion TA1 to improve the light-emitting efficiency and/or transmittance.

At the same time, the equation of the area of the light-emitting portion and the area of the opaque portion adjacent to the light-emitting portion can be expressed as a length ratio, such as A:2B=(a+b):(c+d+e). Therefore, the ratio of the total length of the first light-emitting side L1 to the length of each second light-emitting side L2 can be equal to the ratio of the total length of the second opaque portions NTA2-1, NTA2-2 and NTA2-3 to the total length of the first opaque portions NTA1-1 and NTA1-2.

For example, the ratio of the sum of the lengths 2B of the lengths B of the first light-emitting side of the first red sub-light-emitting portion EA1-1 or the second red sub-light-emitting portion EA1-2 to the length A of the second light-emitting side of the first red sub-light-emitting portion EA1-1 or the second red sub-light-emitting portion EA1-2 may be equal to the sum of the lengths c of the first upper opaque portion NTA2-1, the length d of the middle opaque portion NTA2-2 and the length e of the fourth lower opaque portion NTA2-3 to the length a of the first left opaque portion NTA1-1 or the third left opaque portion NTA1-3 and the length b of the second right opaque portion NTA1-2 or the fourth right opaque portion NTA1-4. Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, the non-transparent portion NTA can be set with a minimum size, thereby improving the luminous efficiency and/or transmittance.

The length a of the first left light-proof portion NTA1-1 or the third left light-proof portion NTA1-3 is in the second direction (X-axis direction) of the length of the first light-emitting side, perpendicular to the length L1 in the first direction (Y-axis direction), and can be expressed as the width of the first left light-proof portion NTA1-1 or the third left light-proof portion NTA1-3. The length b of the right-side second light-proof portion NTA1-2 or the right-side fourth light-proof portion NTA1-4 can refer to the length in the second direction (X-axis direction), perpendicular to the emission side L1 in the first direction (Y-axis direction), and can be expressed as the width of the second right-side light-proof portion NTA1-2 or the fourth right-side light-proof portion NTA1-4. The length 'c' of the first upper light-impermeable portion NTA2-1 may refer to the length in the first direction (Y-axis), perpendicular to the second light-emitting side L2 in the second direction (X-axis), and may be expressed as the width of the first upper light-impermeable portion NTA2-1. The length d of the middle light-impermeable portion NTA2-2 may refer to the length in the first direction (Y-axis) perpendicular to the length of the second light-emitting side L2 in the second direction (X-axis), and may be expressed as the width of the middle light-impermeable portion NTA2-2. The length e of the fourth lower light-impermeable portion NTA2-3 may refer to the length in the first direction (Y-axis) perpendicular to the length of the second light-emitting side L2 in the second direction (X-axis), and may be expressed as the width of the fourth lower light-impermeable portion NTA2-3.

According to an embodiment of the present disclosure, the transparent display device 100 can meet the following conditions, thereby minimizing the size of the non-transparent part NTA, that is, the size of the blind area.

First, the color light emitting portions other than the white light emitting portion SP4, namely the red light emitting portion SP1, the green light emitting portion SP2, and the blue light emitting portion SP3 are arranged to be as adjacent to each other as possible, and therefore, the length of the opaque portion NTA shared by the color light emitting portions can be increased. This is because when the color light emitting portions are arranged adjacent to each other as a color light emitting portion, a wider opaque portion NTA (or a black matrix) needs to be provided outside the light emitting portion to prevent color mixing and light leakage between the color light emitting portions. Therefore, the width of the opaque portion NTA provided between the color light emitting portions can be wider than the width of the opaque portion NTA provided between the color light emitting portion and the transparent portion TA1 and/or the width of the opaque portion NTA provided between the white light emitting portion and the transparent portion TA1. For example, the width of the opaque portion NTA disposed between the color light-emitting portions may be about 24um, the width of the opaque portion NTA disposed between the color light-emitting portion and the transparent portion TA1 may be about 19um, and the width of the opaque portion NTA disposed between the white light-emitting portion and the transparent portion TA1 may be about 4.5um. At the same time, since color mixing and light leakage should be avoided between the color light-emitting portion and the white light-emitting portion, the width of the opaque portion NTA disposed between the color light-emitting portion and the white light-emitting portion may be equal to the width of the opaque portion NTA disposed between the color light-emitting portions.

The transparent display device 100 according to an embodiment of the present disclosure may include a common opaque portion SNTA disposed between a plurality of light-emitting portions and a non-shared opaque portion NNTA disposed between a plurality of light-transmitting portions TA1. Therefore, the opaque portion NTA (or the first common opaque portion SNTA1) disposed between the color light-emitting portions and the opaque portion NTA (or the second common opaque portion SNTA2) disposed between the color light-emitting portions and the white light-emitting portion may be included in the common opaque portion SNTA. In addition, the opaque portion NTA (or the first non-shared opaque portion NNTA1) disposed between the white light emitting portion and the transparent portion TA1 and the opaque portion NTA (or the second non-shared opaque portion NNTA2) disposed between the color light emitting portion and the transparent portion TA1 may be included in the non-shared opaque portion NNTA. As described above, since the shared opaque portion SNTA must prevent color mixing and/or light leakage between the light emitting portions, the width of the shared opaque portion SNTA may be wider than the width of the shared opaque portion NNTA. Similarly, the first opaque portion NTA1 adjacent to the short side of the light emitting portion and the second opaque portion NTA2 adjacent to the long side of the light emitting portion may be included in the shared opaque portion SNTA or the non-shared opaque portion NNTA depending on their arrangement positions.

Each of the light-emitting portions may include a first sub-light-emitting portion and a second sub-light-emitting portion. For example, the red light-emitting portion SP1 may include a first red sub-light-emitting portion EA1-1 and a second red sub-light-emitting portion EA1-2. Therefore, the shared light-proof portion SNTA may also include a light-proof portion NTA disposed between the first sub-light-emitting portion and the second sub-light-emitting portion. Similarly, the non-shared light-proof portion NNTA may also include a light-proof portion NTA disposed between the first sub-light-emitting portion and the light-transmitting portion and between the second sub-light-emitting portion and the light-transmitting portion.

Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, the color light-emitting parts can be arranged to be adjacent to each other as much as possible, so that the length of the shared light-proof part SNTA has the widest width (or thickest width) shared by the color light-emitting parts, thereby the length of the non-shared light-proof part NNTA disposed between the white light-emitting part and the light-transmitting part TA1 and the length of the shared light-proof part NNTA disposed between the color light-emitting part and the light-transmitting part TA1 can be relatively increased. Therefore, the area of the light-emitting part (or light-emitting area) and/or the light-transmitting part TA1 can be increased.

Second, the white light emitting portion SP4 is independently arranged to be adjacent to the color light emitting portion within the minimum range, so that the length of the opaque portion NTA shared with the color light emitting portion can be minimized. As described above, the width of the opaque portion NTA (or the first non-shared opaque portion NNTA1) arranged between the white light emitting portion and the transparent portion TA1 can be narrower than the width of the opaque portion NTA (or the first shared opaque portion SNTA1) arranged between the color light emitting portions, the width of the opaque portion NTA (or the second non-shared opaque portion NNTA2) arranged between the color light emitting portion and the color light emitting portion, and the width of the opaque portion NTA (or the second shared opaque portion SNTA2) arranged between the color light emitting portion and the white light emitting portion. Therefore, since the white light emitting portion SP4 is arranged to be as close to the color emitting portion as possible, the entire width (or size) of the opaque portion NTA can be reduced. Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, as shown in FIGS. 2 and 5 , the white light emitting portion SP4 can be arranged in a bridged form between the color emitting portions including the red light emitting portion SP1, the green light emitting portion SP2, and the blue light emitting portion SP3.

Referring to FIG. 2 , the white light emitting portion SP4 is arranged between the color light emitting portions in the form of a bridge, so that the white light emitting portion SP4 can be arranged adjacent to the transparent portion TA1. Since the length of the opaque portion NTA (or the first non-shared opaque portion NNTA1) arranged between the white light emitting portion SP4 and the transparent portion TA1 is the minimum 4.5um, the width (or size) of the opaque portion NTA surrounding the light emitting portion (or light emitting area) can be minimized in the transparent display device 100 according to an embodiment of the present disclosure, thereby the light emitting portion (or light emitting area) and/or the transparent portion TA1 can be relatively increased.

Third, the area of the light-emitting portion (or light-emitting area) and the area of the opaque portion NTA adjacent to the light-emitting portion may be provided to satisfy a relationship such as (a+b)*(2B)=A*(c+d+e). That is, as shown in FIG3 , the area of the first opaque portion NTA1 may be equal to the area of the second opaque portion NTA2. More specifically, the sum of the areas of the first left opaque portion NTA1-1, the second right opaque portion NTA1-2, the third left opaque portion NTA1-3, and the fourth right opaque portion NTA1-4 may be equal to the sum of the areas of the first upper opaque portion NTA2-1, the middle opaque portion NTA2-2, and the fourth lower opaque portion NTA2-3.

In the transparent display device 100 according to an embodiment of the present disclosure, a light-emitting portion (or light-emitting area), a light-transmitting portion TA1, and a light-impermeable portion NTA may be provided to meet the above three conditions, so that the area of the light-impermeable portion NTA may be minimized. Therefore, since the size of the light-emitting portion (or light-emitting area) and/or the light-transmitting portion TA1 may be increased, the light-emitting efficiency and/or light transmittance may be improved.

、

、

和

那樣實現。在這種情況下，由於在

和

的情況下紅光發光部SP1的水平長度比其垂直長度長太多，因此設置在兩個紅光發光部之間的不透光部NTA的長度，意即，寬度為24um的共用不透光部的長度過長，難以使不透光部NTA的寬度(或尺寸)最小化。 Meanwhile, regarding the first condition, the color light emitting portions, namely the red light emitting portion SP1, the green light emitting portion SP2 and the blue light emitting portion SP3, are arranged to be as close to each other as possible as shown in FIG.

,

,

and

In this case, due to

and

In this case, the horizontal length of the red light emitting portion SP1 is much longer than its vertical length, so the length of the opaque portion NTA arranged between the two red light emitting portions, that is, the length of the common opaque portion with a width of 24um is too long, making it difficult to minimize the width (or size) of the opaque portion NTA.

的情況下，由於兩個綠光發光部SP2設置在紅光發光部SP1和藍光發光部SP3之間，連接兩個綠光發光部的修復線R沒有選擇，只能設置在紅光發光部SP1或藍光發光部SP3中。在這種情況下，修復線R可能與紅光發光部SP1或藍光發光部SP3重疊，使得在修復線R與設置在紅光發光部SP1或藍光發光部SP3中的電路之間可能出現寄生電容，從而光可能不能正常發射。因此，用於使不透光部NTA的面積最小化的彩色發光部可以設置為像

。在根據本公開的一實施例的透明顯示裝置100中，實現了彩色發光部的佈置，意即，紅光發光部SP1、綠光發光部SP2和藍光發光部SP3如像

的方式實現，使得與彩色發光部相鄰的不透光部NTA的面積可以最小化。同時，參考圖5，當白光發光部SP4被設置為與透光部TA1相鄰時，由於白光發光部SP4具有最小寬度為4.5um的盲區，所以白光發光部SP4可以獨立地 設置為最小化不透光部NTA的寬度(或尺寸)。因此，白光發光部SP4可以以橋接的形式設置在綠光發光部SP2的一側(或藍光發光部SP3的另一側)。 exist

In the case of, since the two green light emitting portions SP2 are disposed between the red light emitting portion SP1 and the blue light emitting portion SP3, the repair line R connecting the two green light emitting portions has no choice but to be disposed in the red light emitting portion SP1 or the blue light emitting portion SP3. In this case, the repair line R may overlap with the red light emitting portion SP1 or the blue light emitting portion SP3, so that parasitic capacitance may occur between the repair line R and the circuit disposed in the red light emitting portion SP1 or the blue light emitting portion SP3, and thus light may not be emitted normally. Therefore, the color light emitting portion for minimizing the area of the opaque portion NTA may be disposed as shown in FIG.

In the transparent display device 100 according to an embodiment of the present disclosure, the arrangement of the color light emitting parts is realized, that is, the red light emitting part SP1, the green light emitting part SP2 and the blue light emitting part SP3 are as shown in FIG.

, so that the area of the opaque portion NTA adjacent to the color light-emitting portion can be minimized. At the same time, referring to FIG. 5 , when the white light-emitting portion SP4 is arranged adjacent to the transparent portion TA1, since the white light-emitting portion SP4 has a blind area with a minimum width of 4.5 um, the white light-emitting portion SP4 can be independently arranged to minimize the width (or size) of the opaque portion NTA. Therefore, the white light-emitting portion SP4 can be arranged on one side of the green light-emitting portion SP2 (or the other side of the blue light-emitting portion SP3) in the form of a bridge.

In more detail, as shown in FIG5 , the red light emitting portion SP1 may be arranged so that the two red sub-light emitting portions EA1-1 and EA1-2 are spaced apart from each other in the first direction (Y-axis direction) and have a long side (or second light emitting side L2) in the second direction (X-axis direction) and a short side (or first light emitting side L1) in the first direction (Y-axis direction). Therefore, the light-transmitting portion TA1 and the sub-light-transmitting portion STA may be arranged on both sides of the two red sub-light emitting portions EA1-1 and EA1-2. The sub-light-transmitting portion STA may be a space generated to meet the three conditions of minimizing the width (or size and area) of the opaque portion NTA. The sub-light-transmitting portion STA according to an embodiment of the present disclosure may be arranged between one side of the red light emitting portion SP1 and the light-transmitting portion TA1.

The green light emitting portion SP2 and the blue light emitting portion SP3 may be disposed below the red light emitting portion SP1 in the first direction (Y-axis direction). The green light emitting portion SP2 may be disposed so that the two green sub-light emitting portions EA2-1 and EA2-2 are spaced apart from each other in the first direction (Y-axis direction) and have a short side in the second direction (X-axis direction) and a long side in the first direction (Y-axis direction). Therefore, the second white sub-light emitting portion EA4-2 and the light-transmitting portion TA1 of the white light emitting portion SP4 may be disposed on one side of the first green sub-light emitting portion EA2-1 of the two green sub-lights, and only the light-transmitting portion TA1 may be disposed on one side of the second green sub-light emitting portion EA2-2. The blue light emitting portion SP3 may be disposed on the other side of the two green sub-light emitting portions EA2-1 and EA2-2.

The blue light emitting portion SP3 may be arranged in such a manner that the two blue sub-light emitting portions EA3-1 and EA3-2 are spaced apart from each other in the first direction (Y-axis direction) and have a short side in the second direction (X-axis direction) and a long side in the first direction (Y-axis direction). Therefore, the green light emitting portion SP2 may be arranged on one side of the two blue sub-light emitting portions EA3-1 and EA3-2, another pixel P and the first white sub-light emitting portion EA4-1 of the white light emitting portion SP4 in the light-transmitting portion TA1 may be arranged on the other side of the first blue sub-light emitting portion EA3-1 of the two blue sub-light emitting portions EA3-1 and EA3-2, and only the light-transmitting portion TA1 of another pixel P may be arranged on the other side of the second blue sub-light emitting portion EA3-2.

The white light emitting portion SP4 may be arranged in such a manner that two white sub-light emitting portions EA4-1 and EA4-2 are arranged between the color light emitting portions in a substantially square shape and are spaced apart from each other in the second direction (X-axis direction). Therefore, the first blue sub-light emitting portion of another pixel P may be arranged on one side of the first white sub-light emitting portion EA4-1, and the first green sub-light emitting portion EA2-1 may be arranged on the other side of the second white sub-light emitting portion EA4-2.

Therefore, each of the red light emitting portion SP1, the green light emitting portion SP2, the blue light emitting portion SP3, and the white light emitting portion SP4 includes two sub-light emitting portions (or light emitting areas), which can be arranged adjacent to the light-transmitting portion TA1 or the sub-light-transmitting portion STA. Therefore, the repair line R connecting the two sub-light emitting portions (or light emitting areas) of each light emitting portion SP1, SP2, SP3, and SP4 can be arranged in the light-transmitting portion TA1. In this case, the situation where the repair line R is arranged in the light-transmitting portion TA1 can mean that at least a part of the repair line R is arranged in the light-transmitting portion TA1. Therefore, parasitic capacitance or signal interference that may occur when the repair line is arranged to overlap with the sub-light emitting portion (or light emitting area) can be avoided.

Referring back to FIG. 5 , the first light emitting portion may be configured to have a larger area than each of the second light emitting portion, the third light emitting portion, and the fourth light emitting portion. That is, the red light emitting portion SP1 may be configured to have a larger area than each of the green light emitting portion SP2, the blue light emitting portion SP3, and the white light emitting portion SP4.

In detail, the size of the light-emitting portion may be determined in consideration of life and efficiency. In more detail, as the life of the light-emitting portion becomes longer and the light-emitting efficiency becomes higher, the size of the light-emitting portion may be smaller. On the other hand, the size of the light-emitting portion may be increased as the life of the light-emitting portion becomes shorter and the light-emitting efficiency becomes lower.

First, considering the lifespan, in the case of a general OLED, when the brightness of the light-emitting portion, i.e., the brightness degradation, is as much as about 5% to 10%, the user may be aware of the brightness degradation. In more detail, the user may recognize the brightness degradation of colored light, i.e., red light, blue light, and green light, better than white light. On the other hand, in the case of a transparent OLED, i.e., in the case of the transparent display device 100 disclosed herein, since the user recognizes the illumination (brightness) of the light-emitting portion and the back background at the same time, the user may recognize the brightness degradation when the brightness of the light-emitting portion degrades by as much as 7 to 30%. In more detail, the user may recognize the brightness degradation of blue light better than red light, and may recognize the brightness degradation of green light better than white light. This may mean that the brightness of red light is lower than that of blue light and the brightness of white light is lower than that of green light. At the same time, the case of low brightness may mean that the brightness decreases faster when the same voltage is continuously applied, which may mean a shorter life. Therefore, since the size of the red light emitting portion is larger than that of the blue light emitting portion, the brightness of the red light emitting portion can be increased even at a low voltage, so that the life of the red light emitting portion can be extended.

In addition, since the size of the red light emitting part is larger than that of the blue light emitting part, the user's perception of the degradation of the blue light brightness can be relatively reduced, thereby eliminating the image difference caused by the degradation of the blue light brightness.

In addition, in the case of a general OLED, even if the brightness of the red light emitting portion degrades by as much as about 5%, the user may recognize the brightness degradation. On the other hand, in the case of a transparent OLED, since the user can see the back background through the transparent portion, the user may not realize the brightness degradation until the brightness of the red light emitting portion decreases by about 7%. Therefore, in the transparent display device 100 disclosed in the present invention, the size of the color light emitting portion including the red light emitting portion can be larger than that of a general OLED. Therefore, since the transparent display device 100 disclosed in the present invention can increase the size of the light emitting portion compared to the case of a shared OLED, the brightness of the image can be increased, thereby further improving the user's visibility of the image even if there is a background behind.

Secondly, considering the luminous efficiency, since the illuminance (brightness) decreases as the luminous efficiency becomes lower at the same voltage, the luminous part should be designed to have a large size. Generally, since the luminous efficiency of blue light is the lowest, the size of the luminous part should increase in the order of green light luminous part smaller than red light luminous part smaller than blue light luminous part. However, As described above, since users are more sensitive to the brightness degradation of blue light than red light, the size of the luminous part of red light may be larger than that of the luminous part of blue light, and thus the user's perception of the brightness degradation of blue light may be reduced. In addition, since the life of the red light luminous part is shorter than that of the blue light luminous part, the size of the red light luminous part is larger than that of the blue light luminous part, so that the brightness and life of the red light can be increased.

Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, since the brightness and life of the red light emitting portion are lower than those of the light emitting portion having another color in terms of life and efficiency, the size of the red light emitting portion SP1 can be larger than that of the light emitting portion having another color, thereby increasing the life of the red light emitting portion and improving the brightness of the red light emission.

In addition, since the size of the red light emitting portion increases, the brightness of the red light can be improved, so the user's perception of the brightness degradation of the blue light will be reduced. Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, due to the brightness degradation of the blue light with low efficiency, the user may not recognize the difference in the image, and the overall life of the light emitting portion can be increased.

Referring to FIG. 6 , the common light-proof portion SNTA may include a first common light-proof portion SNTA1 and a second common light-proof portion SNTA2.

The first common opaque portion SNTA1 may refer to an opaque portion NTA disposed between a plurality of color light-emitting portions SP1, SP2, and SP3 (or EA1, EA2, and EA3). For example, the first common opaque portion SNTA1 may be an opaque portion NTA disposed between the first green sub-light-emitting portion EA2-1 and the first blue sub-light-emitting portion EA3-1 in FIG. 6.

The second common light-proof part SNTA2 may refer to a light-proof part disposed between each of the plurality of color light-emitting parts SP1, SP2 and SP3 (or EA1, EA2 and EA3) and the white light-emitting part EA4. For example, the second common light-proof part SNTA2 may be a light-proof part NTA2 disposed between the first green sub-light-emitting part EA2-1 and the second white sub-light-emitting part EA4-2 in FIG. 6 .

The first common light-proof part SNTA1 and the second common light-proof part SNTA2 may have the same width to prevent color mixing and/or light leakage between the light-emitting parts EA1, EA2, EA3, and EA4. For example, referring to FIG. 6, the width W1-1 of the first common light-proof part SNTA1 may be equal to the width W1-2 of the second common light-proof part SNTA2. For example, the width W1-1 of the first common light-proof part SNTA1 may be 24um.

Referring back to FIG. 6 , the non-shared light-proof portion NNTA may include a first non-shared light-proof portion NNTA1 and a second non-shared light-proof portion NNTA2.

The first non-shared non-transparent portion NNTA1 may refer to a non-transparent portion disposed between the white light emitting portion EA4 and the transparent portion TA1. For example, the first non-shared non-transparent portion NNTA1 may be a non-transparent portion NTA disposed between the second white sub-light emitting portion EA4-2 and the transparent portion TA1 in FIG. 6 .

The second non-shared non-light-transmitting portion NNTA2 may refer to a non-light-transmitting portion disposed between each of the color light-emitting portions EA1, EA2, and EA3 and the light-transmitting portion TA1. For example, the second non-shared non-light-transmitting portion NNTA2 may be disposed between the second red sub-light-emitting portion EA1-2 and the light-transmitting portion TA1 (or the sub-light-transmitting portion STA) in FIG. 6.

Since the second non-shared light-proof part NNTA2 is disposed between the color light-emitting part and the light-transmitting part, the color (red, green or blue) light of the color light-emitting part can be emitted toward the light-transmitting part. On the other hand, since the first non-shared light-proof part NNTA1 is disposed between the white light-emitting part and the light-transmitting part, white light can be emitted toward the light-transmitting part. In this case, the user can better identify the color light rather than the white light. Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, since the width W2-2 of the second non-shared light-proof part NNTA2 is wider than the width W2-1 of the first non-shared light-proof part NNTA1, the color light (red, green or blue) can be prevented from being emitted through the light-transmitting part TA1, thereby avoiding the visibility degradation of the background or image behind the display panel.

Referring to FIG. 5 , in a transparent display device 100 according to an embodiment of the present disclosure, the color light-emitting portion may include a red light-emitting portion EA1, a green light-emitting portion EA2, and a blue light-emitting portion EA3. As shown in FIG. 5 , at least a portion of the red light-emitting portion EA1 may overlap with each of the green light-emitting portion EA2 and the blue light-emitting portion EA3 in the first direction (Y-axis direction). The white light-emitting portion EA4 may be disposed adjacent to the green light-emitting portion EA2 in the second direction (X-axis direction), and may be disposed adjacent to the light-transmitting portion TA1 in the first direction (Y-axis direction). This is to minimize the width (or size) of the opaque portion NTA adjacent to each of the light-emitting portions EA1, EA2, EA3, and EA4.

At the same time, as described above, since the red light emitting portion EA1 has a lower life and efficiency than the other light emitting portions EA2, EA3 and EA4, the size of the red light emitting portion EA1 can be larger than the size of the light emitting portion of each of the other light emitting portions EA2, EA3 and EA4. However, as shown in FIG5, the long side L2 of the red light emitting portion EA1 is arranged in the second direction (X-axis direction), and the short side L1 is arranged in the first direction (Y-axis direction), so the red light emitting portion EA1 can be set to a rectangular shape that is longer in the horizontal direction based on FIG5. On the other hand, the short side of the green light emitting portion EA2 is arranged in the second direction (X-axis direction), and the long side is arranged in the first direction (Y-axis direction), so the green light emitting portion EA2 can be set to a rectangular shape that is longer in the vertical direction based on FIG5. Therefore, referring to FIG. 6 , the width SP1W of the red light emitting portion EA1 may be equal to or smaller than the total width of the width SP2W of the green light emitting portion EA2 and the width SP3W of the blue light emitting portion EA3.

Referring to FIG. 6, taking FIG. 6 as an example, when the width SP1W of the red light emitting portion EA1 is equal to the sum of the width SP2W of the green light emitting portion EA2 and the width SP3W of the blue light emitting portion EA3, due to the opaque portion, that is, the first common opaque portion SNTA1 can be arranged between the green light emitting portion EA2 and the blue light emitting portion EA3, the green light emitting portion EA2 can be arranged to protrude further to the left than the red light emitting portion EA1.

Even if the width SP1W of the red light emitting portion EA1 is equal to the total width of the width SPW2 of the green light emitting portion EA2 and the width SP3W of the blue light emitting portion EA3, the width W2-2 of the common opaque portion NNTA2 between the second red sub-light emitting portion EA1-2 and the transparent portion TA1 is narrower than the width W1-1 of the first common opaque portion SNTA1 between the green light emitting portion EA2 and the blue light emitting portion EA3, and the predetermined space can also be generated on one side of the red light emitting portion EA1, for example, on the left side of the red light emitting portion EA1. Therefore, the sub-transparent portion STA can be set in the space formed on the left side of the red light emitting portion EA1.

As another example, when the width SP1W of the red light emitting portion EA1 is narrower than the sum of the width SP2W of the green light emitting portion EA2W and the width SP3W of the blue light emitting portion EA3, the green light emitting portion EA2 may be arranged to protrude further toward the left side of the red light emitting portion EA1. Thus, the size of the space generated on the left side of the red light emitting portion EA1 may be increased.

In the transparent display device 100 according to an embodiment of the present disclosure, the space generated on the left side of the red light emitting portion EA1 can be used as a sub-transparent portion STA. As shown in FIG5, the sub-transparent portion STA can be arranged between the transparent portion TA1 and the red light emitting portion EA1. The sub-transparent portion STA can be generated by satisfying three conditions to minimize the width (or size) of the opaque portion NTA adjacent to the light emitting portion. The sub-transparent portion STA can be arranged to have a predetermined width STAW between the red light emitting portion and the transparent portion TA1 (as shown in FIG6). In more detail, referring to FIG. 6 , the sub-transparent portion STA may be provided by a width STAW obtained by subtracting a second width sum from a first width sum, wherein the first width sum is a width SP2W of the first green sub-light emitting portion EA2-1, a width SP3W of the first blue sub-light emitting portion EA3-1, a width W1-W2W of the second common opaque portion SNTA2 adjacent to the left side of the first green sub-light emitting portion EA2-1, and a width W2-W3W of the second common opaque portion SNTA2 adjacent to the left side of the first green sub-light emitting portion EA2-1. 2 and the sum of the width W1-1 of the first shared opaque portion SNTA1 disposed between the first green sub-light-emitting portion EA2-1 and the first blue sub-light-emitting portion EA3-1, and the second width sum is the sum of the width SP1W of the second red sub-light-emitting portion EA1-2 and the width W2-2 (or "a") of the second non-shared opaque portion NNTA2 adjacent to the left side of the second red sub-light-emitting portion EA1-2. Therefore, the transparent display device 100 according to an embodiment of the present disclosure may also include a sub-transparent portion STA having a predetermined width STAW in the transparent portion TA1 adjacent to the light-emitting portion, thereby improving the transmittance.

The sub-light-transmitting portion STA may be formed integrally with the adjacent light-transmitting portion TA1, or may be formed separately from the light-transmitting portion TA1. When the sub-light-transmitting portion STA is formed integrally with the adjacent light-transmitting portion TA1, the area of the light-transmitting portion may be increased, and thus the light transmittance may be improved. At the same time, since the sub-light-transmitting portion STA is disposed adjacent to the red light-emitting portion EA1 (or the left side of the red light-emitting portion EA1), the transparent display device 100 may have a structural feature in which the area of the light-transmitting portion adjacent to the red light-emitting portion EA1 (or the left side of the red light-emitting portion EA1) is larger than the area of the light-transmitting portion adjacent to other light-emitting portions.

In the above example, it has been described that the space generated between the red light emitting portion EA1 and the light-transmitting portion TA1 is used as a sub-light-transmitting portion STA to improve the transmittance, but the size of the red light emitting portion EA1 and/or the green light emitting portion EA2 may be increased so that the red light emitting portion EA1 and/or the green light emitting portion EA2 are disposed in the space. In this case, since the size of the light-transmitting portion TA1 is not changed, the light-emitting efficiency of the red light and/or the green light can be further improved without reducing the transmittance. As another example, the blue light emitting portion EA3 and/or the white light emitting portion EA4 may be additionally disposed in the space to improve the light-emitting efficiency of the blue light and/or the white light without reducing the transmittance.

Hereinafter, an example of setting the first signal line SL1, the second signal line SL2 and the driving transistor will be described in detail with reference to FIG. 7 and FIG. 8.

FIG. 7 is a diagram showing an example of configuring a plurality of signal lines and a plurality of drive transistors; FIG. 8 is a cross-sectional view taken along line II' shown in FIG. 7.

As described above, the display area DA includes the light-emitting portion EA (or SP), the light-transmitting portion TA1, the opaque portion NTA, and the sub-transmitting portion STA. The opaque portion NTA may extend along the first direction (Y-axis direction) between adjacent light-transmitting portions TA1, or may extend along the second direction (X-axis direction) between adjacent light-transmitting portions TA1.

The second signal line SL2 and the driving transistors TR1, TR2, and TR3 of the light emitting parts SP1, SP2, and SP3 arranged to overlap with the second signal line SL2 may be arranged in the opaque part NTA. For example, at least a portion of the first light emitting part EA1 (or SP1), the second light emitting part EA2 (or SP2), and the third light emitting part EA3 (or SP3) may be arranged to overlap with the second signal line SL2, and may be arranged alternately along the second signal line SL2. The second signal line SL2, the first driving transistor TR1 of the first light emitting part SP1, the second driving transistor TR2 of the second light emitting part SP2, and the third driving transistor TR3 of the third light emitting part SP3 may be arranged in the opaque part NTA in the vertical direction based on FIG. 7 . The fourth driving transistor TR4 and the first signal line SL1 of the fourth light emitting portion SP4 can be arranged in the opaque portion NTA in the horizontal direction based on FIG. 7 .

The second signal line SL2 may be disposed in the light-proof portion NTA and extend in the first direction (Y-axis direction). The second signal line SL2 may include a plurality of signal lines, such as a power line. The power line may include a first power line and a second power line.

The first power line may be disposed in the light-proof portion NTA and extend in the first direction (Y-axis direction). In one embodiment, the first power line may be a pixel power line VDDL for supplying a first power to the first electrode 114 of each light-emitting portion SP1, SP2, SP3, and SP4.

The second power line may be disposed in the light-proof portion NTA and extend in a first direction (Y-axis direction) parallel to the first power line. In one embodiment, the second power line may be a common power line VSSL for providing a second power source to the second electrode 117 of each light-emitting portion SP1, SP2, SP3, and SP4.

For example, the second signal line SL2 may also include a first data line DL1, a reference line REFL, a second data line DL2, a third data line DL3, and a fourth data line DL4.

In detail, the reference line REFL may be disposed in the opaque portion NTA and extend in the first direction (Y-axis direction). The reference line REFL may provide a reference voltage (or an initialization voltage or a sensing voltage) to a driving transistor of each light-emitting portion SP1, SP2, SP3, and SP4 disposed in the display area DA.

The first data line DL1 may be disposed in the opaque portion NTA, the first data line DL1 may be disposed on the first side of the reference line REFL, and may extend in the second first direction (Y-axis direction). The first data line DL1 may provide a data voltage to at least a portion of the light-emitting portions SP1, SP2, SP3, and SP4 disposed in the display area DA.

For example, the first data line DL1 can provide the first data voltage to the second driving transistor TR2 of the second light emitting portion SP2 disposed on the first side of the reference line REFL.

The second data line DL2 may be disposed in the opaque portion NTA, the second data line DL2 may be disposed on the second side of the reference line REFL, and may extend in the first direction (Y-axis direction). In this case, the second side disposed on the reference line REFL may be a side facing the first side. For example, when the first side is the left side of the reference line REFL, the second side may be the right side of the reference line REFL. The second data line DL2 may provide a data voltage to one of the light-emitting portions other than the light-emitting portion connected to the first data line DL1, the light-emitting portion being a portion of the light-emitting portions SP1, SP2, SP3, and SP4 disposed in the display area DA.

For example, the second data line DL2 can provide a second data voltage to the first driving transistor TR1 of the first light emitting portion SP1 disposed on the second side of the reference line REFL.

The third data line DL3 may be disposed in the opaque portion NTA, the third data line DL3 may be disposed on one side of the second data line DL2, for example, on the right side of the second data line DL2, and may extend in the first direction (Y-axis direction). The third data line DL3 may provide a data voltage to one of the light-emitting portions other than the light-emitting portion connected to each of the first data line DL1 and the second data line DL2, the light-emitting portion being a portion of the light-emitting portions SP1, SP2, SP3, and SP4 disposed in the display area DA.

For example, the third data line DL3 can provide a third data voltage to the third driving transistor TR3 of the third light emitting portion SP3 disposed under the first driving transistor TR1.

The fourth data line DL4 may be disposed in the opaque portion NTA, the fourth data line DL4 may be disposed on one side of the third data line DL3, for example, on the right side of the third data line DL3, and may extend in the first direction (Y-axis direction). The fourth data line DL4 may provide a data voltage to one of the light-emitting portions other than the light-emitting portion connected to each of the first data line DL1, the second data line DL2, and the third data line DL3, the light-emitting portion being a portion of the light-emitting portions SP1, SP2, SP3, and SP4 disposed in the display area DA.

For example, the fourth data line DL4 can provide a fourth data voltage to the fourth drive transistor TR4 of the fourth light emitting portion SP4 disposed along the second direction (X-axis direction) between the first drive transistor TR1 and the third drive transistor TR3.

In the transparent display device 100 according to an embodiment of the present disclosure, the reference line REFL may be set not adjacent to the first to fourth data lines DL1, DL2, DL3, and DL4. A fixed voltage may be applied to the reference line REFL, and a data voltage may be applied to the data lines DL1, DL2, DL3, and DL4 in the form of a pulse. When the reference line REFL is set adjacent to the data lines DL1, DL2, DL3, and DL4, when the voltage of the data lines DL1, DL2, DL3, and DL4 changes, a crosstalk phenomenon due to capacitive coupling may occur between the reference line REFL and the data lines DL1, DL2, DL3, and DL4. In this case, the voltage of the reference line REFL may be changed, and in addition, the brightness of the light-emitting parts SP1, SP2, SP3, and SP4 may be changed. Therefore, dark or light lines may appear.

The display panel (or transparent display panel) of the transparent display device 100 disclosed in the present invention may include a large-area light-transmitting portion TA1 to ensure light transmittance, and may include a relatively narrow light-impermeable portion NTA. Since a plurality of signal lines do not have light transmittance, the plurality of signal lines may be disposed in the light-impermeable portion NTA. In this case, since the display panel (or transparent display panel) includes a plurality of signal lines disposed in the light-impermeable portion NTA having a narrower area than the common display panel, the spacing distance between the signal lines may be reduced. For this reason, in the transparent display panel, the parasitic capacitance between the reference line REFL and the data lines DL1, DL2, DL3, and DL4 increases, and the crosstalk phenomenon due to coupling may occur more seriously.

In the transparent display device 100 according to an embodiment of the present disclosure, in order to minimize the parasitic capacitance between the reference line REFL and the data lines DL1, DL2, DL3, and DL4 in a limited space, the reference line REFL and the data lines DL1, DL2, DL3, and DL4 may not be arranged adjacent to each other.

In detail, in the transparent display device 100 according to an embodiment of the present disclosure, the pixel power line VDDL or the common power line VSSL may be disposed between the reference line REFL and the first data line DL1, so that the reference line REFL and the first data line DL1 may not be disposed adjacent to each other. In addition, in the transparent display device 100 according to an embodiment of the present disclosure, the pixel power line VDDL or the common power line VSSL may be disposed between the reference line REFL and the second data line DL2, so that the reference line REFL and the second data line DL2 may not be disposed adjacent to each other. Because a fixed power voltage that is not a pulse shape is applied to the pixel power line VDDL or the common power line VSSL, the influence of the pixel power line VDDL or the common power line VSSL on the reference line REFL may be very small.

That is, in the transparent display device 100 according to an embodiment of the present disclosure, different signal lines can be arranged between the reference line REFL and the data lines DL1 and DL2, so that the spacing distance between the reference line REFL and the data lines DL1 and DL2 can be increased. Therefore, the transparent display device 100 according to an embodiment of the present disclosure can reduce the parasitic capacitance between the reference line REFL and the data lines DL1 and DL2.

Since the third data line DL3 and the fourth data line DL4 are separated from the reference line REFL instead of the second data line DL2, the parasitic capacitance between the reference line REFL and the data lines DL3 and DL4 can be further reduced.

Meanwhile, in the transparent display device 100 according to an embodiment of the present disclosure, the reference line REFL and the data lines DL1, DL2, DL3, and DL4 may be disposed in different layers. Specifically, the reference line REFL may be disposed in a first layer, such as between the interlayer insulating layer 111b and the buffer layer BL, and the data lines DL1, DL2, DL3, and DL4 may be disposed in a second layer different from the first layer, such as between the buffer layer BL and the first substrate 110.

In one embodiment, the reference line REFL may be provided on the same layer as one of the elements constituting the drive transistor TR (or 112). In detail, the reference line REFL may be provided on the same layer as any one of the active layer 112a, the gate electrode 112b, the source electrode 112c, and the drain electrode 112d of the drive transistor 112. For example, referring to FIG. 8 , the reference line REFL may be provided on the same layer as the gate electrode 112b.

In one embodiment, the data lines DL1, DL2, DL3, and DL4 may be disposed between the driving transistor 112 and the first substrate 110. For example, the data lines DL1, DL2, DL3, and DL4 may be disposed on the same layer as the light shielding layer LS as shown in FIG. 8 .

In the transparent display device 100 according to an embodiment of the present disclosure, the reference line REFL and the data lines DL1, DL2, DL3, and DL4 are arranged in different layers, so that the spacing distance between the reference line REFL and the data lines can maximize DL1, DL12, DL3, DL3, and DL4 in a limited space. Therefore, the transparent display device 100 according to an embodiment of the present disclosure can minimize the parasitic capacitance between the reference line REFL and the data lines DL1, DL2, DL3, and DL4.

At the same time, based on FIG. 7 , the first signal line SL1 and the driving transistor TR4 of the fourth light-emitting portion SP4 which is set to be separated from or overlapped with the first signal line SL1 can be set in the horizontal direction, that is, in the opaque portion NTA in the second direction (X-axis direction).

The first signal line SL1 may be disposed in the opaque portion NTA and extend in the second direction (X-axis direction). The first signal line SL1 may include a plurality of signal lines. For example, the first signal line SL1 may include at least one scanning line SCANL.

In the following description, a scanning line SCANL is provided in the opaque portion NTA, but this is not limited thereto. Two or more scanning lines may be provided in the opaque portion NTA.

In detail, the scanning line SCANL may be disposed in the opaque portion NTA and extend in the second direction (X-axis direction). The scanning line SCANL may provide a scanning signal to at least a portion of the light-emitting portions SP1, SP2, SP3, and SP4 disposed in the display area DA.

For example, the scanning line SCANL can provide a scanning signal to the first driving transistor TR1 of the first light emitting portion SP1, the second driving transistor TR2 of the second light emitting portion SP2, the third driving transistor TR3 of the third light emitting portion SP3, and the fourth driving transistor TR4 of the fourth light emitting portion SP4.

The scan line SCANL may be formed on a different layer from the second signal line SL2. In detail, the scan line SCANL may be formed on a different layer from the first data line DL1, the reference line REFL, the second data line DL2, the third data line DL3, and the fourth data line DL4.

In one embodiment, the scan line SCANL may be disposed on the same layer as one of the elements constituting the drive transistor 112. In detail, the scan line SCANL may be disposed on the same layer as any one of the active layer 112a, the gate electrode 112b, the source electrode 112c, and the drain electrode 112d of the drive transistor 112. For example, the scan line SCANL may be disposed on the same layer as the source electrode 112c and the drain electrode 112d.

Referring back to FIG. 1 , the non-display area NDA may include a pad area PA in which a pad is disposed and at least one gate driver GD.

In detail, the non-display area NDA may include a first non-display area NDA1 disposed on one side of the display area DA, a second non-display area NDA2 disposed on the other side perpendicular to the one side of the display area DA, a third non-display area NDA3 disposed in parallel with the second non-display area NDA2 with the display area DA interposed therebetween, and a fourth non-display area NDA4 disposed in parallel with the first non-display area NDA1 with the display area DA interposed therebetween. In this case, the pad area PA may be disposed in the first non-display area NDA1.

The fourth non-display area NDA4 may be provided with a pixel power shorting bar VDD connected to a plurality of pixel power lines VDDL provided in the display area DA and a common power shorting bar VSS connected to a plurality of common power lines VSSL provided in the display area DA.

The gate driver GD may be disposed in any one of the second non-display area NDA2 and the third non-display area NDA3. The gate driver GD is connected to the scan line to provide a scan signal. The gate driver GD may be disposed on one or both sides of the display area DA in a gate-in-plane (GIP) manner. For example, as shown in FIG. 1 , one gate driver GD may be formed in the second non-display area NDA2 and another gate driver GD may be formed in the third non-display area NDA3, but the present disclosure is not limited thereto. The gate driver GD may be formed in only one of the second non-display area NDA2 and the third non-display area NDA3.

Hereinafter, a pixel P of a transparent display device 100 according to an embodiment of the present disclosure will be described with reference to FIG. 2 and FIG. 5 to FIG. 8.

Referring to FIG. 2 and FIG. 5 to FIG. 8 , each of the pixels P disposed in the display area DA may include a plurality of light emitting SPs (or EAs) and a light transmitting portion TA1. In addition, each of the pixels P may further include a sub-light transmitting portion STA. As shown in FIG. 2 , the light transmitting portion TA1 may be disposed adjacent to at least a portion of the light emitting portions SP. The sub-light transmitting portion STA according to an embodiment of the present disclosure may be disposed between the light transmitting portion TA1 and the red light emitting portion SP1. Referring to FIG. 8 , each of the light emitting portions SP may include a buffer layer BL disposed on the first substrate 110 to prevent moisture from penetrating into the thin film transistor 112.

In addition, each light-emitting portion SP according to an embodiment of the present disclosure may include an inorganic layer 111 disposed on the upper surface of the buffer layer BL, including a gate insulating layer 111a, an interlayer insulating layer 111b and a passivation layer 111c (also called a protective layer 111c), a planarization layer 113 disposed on the inorganic layer 111, a first electrode 114 disposed on the planarization layer 113, a bank 115, an organic light-emitting layer 116, a second electrode 117 and an encapsulation layer 118.

The thin film transistor 112 for driving the light emitting portion SP may be disposed in the inorganic layer 111. The inorganic layer 111 may also be referred to as a circuit element layer. The buffer layer BL may be included in the inorganic layer 111 together with the gate insulating layer 111a, the interlayer insulating layer 111b, and the passivation layer 111c. The first electrode 114, the organic light emitting layer 116, and the second electrode 117 may be included in the light emitting element.

The buffer layer BL may be formed between the first substrate 110 and the gate insulating layer 111a to protect the thin film transistor 112. The buffer layer BL may be disposed on one entire surface (or front surface) of the first substrate 110. The buffer layer BL may be used to prevent the material contained in the first substrate 110 from diffusing into the transistor layer during a high temperature process of the manufacturing process of the thin film transistor. Alternatively, the buffer layer BL may be omitted as appropriate.

According to an embodiment of the present disclosure, the thin film transistor (or driving transistor) 112 may include an active layer 112a, a gate electrode 112b, a source electrode 112c, and a drain electrode 112d.

The active layer 112a may include a channel region, a drain region, and a source region formed in a thin film transistor region of a circuit region of the pixel P. The drain region and the source region may be spaced apart from each other with the channel region interposed therebetween.

The active layer 112a may be formed of a semiconductor material based on any one of amorphous silicon, polycrystalline silicon, oxide, and organic material.

The gate insulating layer 111a may be formed on the channel region of the active layer 112a. For example, the gate insulating layer 111a may be formed only in an island shape on the channel region of the active layer 112a, or may be formed on the entire front surface of the first substrate 110 or the buffer layer BL including the active layer 112a.

The gate electrode 112b may be formed on the gate insulating layer 111a to overlap with the channel region of the active layer 112a.

The interlayer insulating layer 111b may be formed on the gate electrode 112b and the drain region and the source region of the active layer 112a. The interlayer insulating layer 111b may be formed in the circuit region and the entire light emitting region where light is emitted to the pixel P. For example, the interlayer insulating layer 111b may be made of an inorganic material, but is not limited thereto.

The source electrode 112c can be electrically connected to the source region of the active layer 112a through a source contact hole provided in the interlayer insulating layer 111b overlapping the source region of the active layer 112a.

The drain electrode 112d can be electrically connected to the drain region of the active layer 112a through a drain contact hole provided in the interlayer insulating layer 111b overlapping the drain region of the active layer 112a.

The drain electrode 112d and the source electrode 112c may be made of the same metal material. For example, each of the drain electrode 112d and the source electrode 112c may be made of a single metal layer, a single layer alloy, or a multi-layer alloy of two or more layers, which is the same as or different from the material of the gate electrode.

In addition, the circuit area may further include a first switching thin film transistor and a second switching thin film transistor and a capacitor provided together with the thin film transistor 112. Since each of the first switching thin film transistor and the second switching thin film transistor is provided on the circuit area of the pixel P to have the same structure as the thin film transistor 112, the description thereof will be omitted. The capacitor may be provided in a region where the gate electrode 112b and the source electrode 112c of the thin film transistor 112 overlap each other with the interlayer insulating layer 111b interposed therebetween.

In addition, in order to prevent the threshold voltage of the thin film transistor disposed in the pixel region from being shifted by light, the display panel or the first substrate 110 may further include a light shielding layer (shown in FIG. 8 ) disposed under the active layer 112a of at least one of the thin film transistor 112, the first switching thin film transistor, and the second switching thin film transistor. The light shielding layer may be disposed between the first substrate 110 and the active layer 112a to shield the light incident on the active layer 112a through the first substrate 110, thereby minimizing the change in the transistor threshold voltage caused by external light.

The protective layer 111c may be disposed on the first substrate 110 to cover the pixel region. The protective layer 111c covers the drain electrode 112d and the source electrode 112c of the thin film transistor 112 and the interlayer insulating layer 111b. The protective layer 111c may be completely formed in the circuit region and the light-emitting region. For example, the protective layer 111c may be represented as a passivation layer. The protective layer 111c may be omitted.

The planarization layer 113 may be formed on the first substrate 110 to cover the protective layer 111c. When the passivation layer 111c is omitted, the planarization layer 113 may be provided on the first substrate 110 to cover the circuit area. The planarization layer 113 may be formed entirely in the circuit area and the light-emitting area. In addition, the planarization layer 113 may be formed on other areas except the pad area PA in the non-display area NDA and the entire display area DA. For example, the planarization layer 113 may include an extension portion (or an enlarged portion) extending or enlarged from the display area DA to other non-display areas NDA except the pad area PA. Therefore, the planarization layer 113 may have a size relatively wider than that of the display area DA.

The planarization layer 113 according to an embodiment of the present disclosure can be formed to be relatively thick, so that a flat surface can be provided on the display area DA and the non-display area NDA. For example, the planarization layer 113 can be made of an organic material such as photoacrylic acid, benzocyclobutene, polyimide, and fluororesin.

The first electrode 114 of the light-emitting portion SP may be formed on the planarization layer 113 and the passivation layer 111c. The first electrode 114 is connected to the drain node or the source node of the thin film transistor 112 through a contact hole that penetrates the planarization layer 113 and the passivation layer 111c. In the cross-sectional view of FIG8, the first electrode 114 is not connected to the drain electrode or the source electrode, but this is because the thin film transistor 112 is not connected to the drain electrode or the source electrode at the cross-sectional position of FIG7. The first electrode 114 may be connected to the drain electrode or the source electrode of the thin film transistor 112 through the contact hole.

The first electrode 114 may be made of at least one of a transparent metal material, a semi-transparent metal material, or a metal material having high reflectivity.

When the transparent display device 100 is provided in a top light-emitting mode, the first electrode 114 may be formed of a metal material having high reflectivity or a structure in which a metal material having high reflectivity and a transparent metal material are stacked. For example, the first electrode 114 may be formed of a metal material having high reflectivity, such as a stacked structure of aluminum and titanium (Ti/Al/Ti), a stacked structure of aluminum and indium tin oxide ITO (ITO/Al/ITO), a silver alloy, and a stacked structure of a silver alloy and indium tin oxide ITO (ITO/silver alloy/ITO). The silver alloy may be an alloy of silver (Ag), palladium (Pd), copper (Cu), etc.

When the transparent display device 100 is provided in a bottom emission mode, the first electrode 114 may be formed of a light-transmitting transparent conductive material (TCO) such as indium tin oxide ITO and indium zinc oxide IZO, or a semi-transparent conductive material such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag).

Meanwhile, the material constituting the first electrode 114 may include a molybdenum-titanium alloy MoTi. The first electrode 114 may be an anode electrode or a pixel electrode.

The bank 115 is a non-luminous non-light-emitting area, and can be provided to surround each luminous area (or luminous part) of each of the luminous parts SP. That is, the bank 115 can divide (or define) each luminous area (or luminous part).

The bank 115 may be formed on the planarization layer 113 to cover the edge of the first electrode 114, thereby dividing (or defining) the light-emitting regions (or light-emitting portions) of the light-emitting portions SP.

The bank 115 may be formed to cover the edge of the first electrode 114 of each light-emitting portion SP and expose a portion of each first electrode 114. Therefore, the current is concentrated at the end of each first electrode 114 to avoid the problem of reduced light-emitting efficiency. The exposed portion of the first electrode 114 not covered by the bank 115 may be a light-emitting region (or light-emitting portion).

The bank 115 may be formed of an organic layer such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, and polyimide resin, but is not limited thereto.

The organic light emitting layer 116 is formed on the first electrode 114 and the bank 115. When a voltage is applied to the first electrode 114 and the second electrode 117, holes and electrons move to the organic light emitting layer 116, respectively, and are combined with each other in the organic light emitting layer 116 to emit light.

The organic light-emitting layer 116 may be formed of a common layer provided by the light-emitting parts SP and the bank 115. In this case, the organic light-emitting layer 116 may be arranged in a tandem structure in which a plurality of light-emitting layers such as a yellow-green light-emitting layer and a blue light-emitting layer are stacked and white light may be emitted when an electric field is formed between the first electrode 114 and the second electrode 117.

Color filters (not shown) suitable for the corresponding light-emitting parts SP may be formed on the second substrate 120. For example, a red filter may be provided in a red sub-pixel, a green filter may be provided in a green sub-pixel, and a blue filter may be provided in a blue sub-pixel. The white sub-pixel may not include a filter because the organic light-emitting layer 116 emits white light.

The second electrode 117 is formed on the organic light emitting layer 116. The second electrode 117 may be a common layer formed together in the light emitting portion SP. The second electrode 117 may be made of a transparent metal material, a semi-transparent metal material, or a metal material having a high reflectivity.

When the transparent display device 100 is provided in a top light emission mode, the second electrode 117 may be formed of a light-transmitting transparent conductive material (TCO) such as indium tin oxide ITO and indium zinc oxide IZO, or a semi-transparent conductive material such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag).

When the transparent display device 100 is provided in a bottom-emitting mode, the second electrode 117 may be formed of a metal material having a high reflectivity, such as a stacked structure of aluminum and titanium (Ti/Al/Ti), a stacked structure of aluminum and ITO (ITO/Al/ITO), a silver alloy and a stacked structure of silver alloy and ITO (ITO/silver alloy/ITO). The Ag alloy may be an alloy of silver (Ag), palladium (Pd), copper (Cu), etc. The second electrode 117 may be a cathode electrode or an opposite electrode.

The encapsulation layer 118 is formed on the second electrode 117. The encapsulation layer 118 is used to prevent oxygen or water from penetrating into the organic light-emitting layer 116 and the second electrode 117. To this end, the encapsulation layer 118 may include at least one inorganic layer.

In the transparent display device 100 according to an embodiment of the present disclosure, the encapsulation layer 118 can be disposed not only in the display area DA but also in the non-display area NDA. The encapsulation layer 118 according to an embodiment of the present disclosure can be disposed between the second electrode 117 and the second substrate 120.

Referring back to FIG. 8 , the filter 119 and the black matrix BM may be disposed between the encapsulation layer 118 and the second substrate 120. As described above, since the organic light emitting layer 116 emits white light, the white light emitting portion SP4 may not include a color filter. Conversely, a red filter may be disposed between the encapsulation layer 118 and the second substrate 120 in the red light emitting portion SP1.

As shown in FIG8 , the black matrix BM may be disposed between the red light emitting portion SP1 and the light-transmitting portion TA1 and between the red light emitting portion SP1 and the sub-light-transmitting portion STA to prevent color mixing and/or light leakage. The black matrix BM may be made of a black substrate material and may be disposed to overlap with the bank 115. The area where the black matrix BM and/or the bank 115 are disposed may be a blind area or a non-light emitting area. According to an embodiment of the present disclosure, the black matrix BM may be formed on the second substrate 120 to at least partially overlap with the bank 115, thereby reducing the cell gap between the organic light emitting layer 116 and the second substrate 120 to prevent color mixing from occurring between the light emitting portions SP.

The first substrate 110 provided with the encapsulation layer 118 and the second substrate 120 provided with the filter 119 can be bonded to each other through a separate adhesive layer AL. The adhesive layer AL can be an optically clear resin layer (OCR) layer or an optically clear adhesive film (OCA) layer.

Hereinafter, the sub-electrode SE of the transparent display device 100 according to an embodiment of the present disclosure will be described in detail with reference to FIG. 9 and FIG. 10.

FIG9 is a cross-sectional view taken along the line II-II' shown in FIG7; FIG10 is a top view showing an example of configuring the sub-electrode contact portion in a sawtooth shape.

Referring to FIGS. 7 to 10 , the transparent display device 100 according to an embodiment of the present disclosure may further include a sub-electrode SE.

The sub-electrode SE is used to apply a common voltage to the pixels P disposed at the edge and/or center of the display area DA. When the transparent display device 100 is provided to have a large area, a voltage drop of the common voltage applied from the edge portion of the display area DA may occur in the center portion of the display area DA due to an internal line or resistance of the internal line. Therefore, uneven brightness may occur between the edge portion and the center portion of the display area DA. In the transparent display device 100 according to an embodiment of the present disclosure, since the sub-electrode SE is provided, such uneven brightness does not occur. The sub-electrode SE according to an embodiment of the present disclosure may be disposed in each of the pixels P disposed in the display area DA. For example, referring to FIG. 7 , the sub-electrode SE may be disposed in the sub-transparent portion STA. The sub-electrode SE may be disposed in the sub-transparent portion STA and connected to the common power line VSSL. The sub-electrode SE may contact the second electrode (or the opposite electrode) 117 through the sub-electrode contact portion CNT disposed in the sub-transparent portion STA. Therefore, since the sub-electrode SE may apply the common power applied through the common power line VSSL to the second electrode 117 of each pixel P, uneven brightness in the display area DA may be avoided.

Hereinafter, the sub-electrode contact portion CNT will be described in detail with reference to FIG. 9. The sub-electrode contact portion CNT may be disposed in the sub-light-transmitting portion STA. Since the sub-electrode contact portion CNT is disposed in the sub-light-transmitting portion STA, the transmittance of the light-transmitting portion TA1 may be improved compared to the case where the sub-electrode contact portion CNT is disposed in the light-transmitting portion TA1.

The sub-electrode contact portion CNT according to an embodiment of the present disclosure may include a buffer layer BL, an interlayer insulating layer 111b, a passivation layer 111c, a planarization layer 113, and a bank 115. A portion of the bank 115, the planarization layer 113, and the passivation layer 111c disposed in the sub-electrode contact portion CNT may be patterned by a photolithography process and an etching process. In this case, an undercut portion UC may be formed under the planarization layer 113 by using an etching material for etching an inorganic material, so that the passivation layer 111c made of an inorganic material is etched more than the planarization layer 113 made of an organic material. 9 , the upper surface of the sub-electrode SE may be exposed in the area surrounded by the undercut portion UC, that is, in the sub-electrode contact portion CNT. The organic light-emitting layer 116 formed in a subsequent process may be broken due to the undercut portion UC, so that the sub-electrode SE may be partially exposed from the undercut portion UC without being completely covered by the organic light-emitting layer 116. Therefore, the second electrode 117 formed in the next process may contact the upper surface of the sub-electrode SE exposed from the undercut portion UC. Since the second electrode 117 is a common layer formed in the entire display area DA, the second electrode 117 may apply a common power (or a common voltage) to the pixel P adjacent to the sub-electrode contact portion CNT. Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, since the second electrode 117 is electrically connected to the sub-electrode SE in the sub-transparent portion STA, the brightness unevenness between the pixel P disposed at the edge of the display area DA and the pixel P disposed at the center of the display area DA can be avoided.

10 , in a transparent display device 100 according to an embodiment of the present disclosure, sub-electrodes SE may be alternately disposed in the pixels P disposed along the first direction (Y-axis direction) and/or the second direction (X-axis direction). In more detail, one sub-electrode SE may be disposed for every two pixels P located adjacent to each other, so that the sub-electrode SE may be connected to a common power line VSSL. For example, the sub-electrode SE may be disposed in the first pixel P1, the third pixel P3, the fifth pixel P5, the seventh pixel P7, and the ninth pixel P9 among nine pixels P1, P2, P3, P4, P5, P6, P7, P8, and P9, that is, the sub-electrode SE may be disposed in the odd-numbered pixels P among the nine pixels P1, P2, P3, P4, P5, P6, P7, P8, and P9. For example, the first sub-electrode SE1 may be disposed in the first pixel P1, the second sub-electrode SE2 may be disposed in the third pixel P3, the third sub-electrode SE3 may be disposed in the fifth pixel P5 , the fourth sub-electrode SE4 may be disposed in the seventh pixel P7, and the fifth sub-electrode SE5 may be disposed in the ninth pixel P9, but the present disclosure is not limited thereto. The sub-electrode SE may be disposed in the even-numbered pixel P among the nine pixels P1, P2, P3, P4, P5, P6, P7, P8, and P9.

When a sub-electrode SE is provided for each of the pixels P, since the sub-electrode SE covers a predetermined area of the sub-transparent portion STA, the transmittance is reduced compared to the case where the sub-electrodes SE are alternately arranged. In the transparent display device 100 according to an embodiment of the present disclosure, as shown in FIG. 10 , the transmittance of the sub-transparent portion STA can be improved compared to the case where the sub-electrode SE (or the sub-electrode contact portion CNT) is arranged in each of the pixels P.

Since the sub-electrodes SE (or sub-electrode contact portions CNT) are alternately arranged in the pixels P, as shown in FIG. 10, the sub-electrodes SE can be arranged in the pixels P in a zigzag pattern in the first direction (Y-axis direction) and/or the second direction (X-axis direction). For example, the first sub-electrode SE1 arranged in the first pixel P1, the third sub-electrode SE3 arranged in the fifth pixel P5, and the fourth sub-electrode SE4 arranged in the seventh pixel P7 can be provided in a saw-toothed form in the first direction (Y-axis direction). In addition, the first sub-electrode SE1 arranged in the first pixel P1, the third sub-electrode SE3 arranged in the fifth pixel P5, and the second sub-electrode SE2 arranged in the third pixel P3 can be provided in a saw-toothed form in the second direction (X-axis direction).

Therefore, in the transparent display device 100 according to an embodiment of the present disclosure, the sub-electrode SE (or the sub-electrode contact portion CNT) is arranged in a sawtooth pattern, so that the sub-electrode SE (or the sub-electrode contact portion) is like the case where the sub-electrode SE (or the sub-electrode contact portion CNT) is arranged in each of the pixels P, which can prevent the user from seeing the sub-electrode contact portion CNT in a row (or regularly), thereby improving the visibility of the background and/or image through the sub-transparent portion STA.

According to this disclosure, the following benefits can be obtained.

According to the transparent display device of the present disclosure, the light-proof part may include a light-proof part disposed between the light-proof part and the plurality of light-emitting parts and between the plurality of light-emitting parts in the display area. In the present disclosure, since the first light-proof part and the second light-proof part of the light-proof part are provided to satisfy the equation A: 2B = (a + b): (c + d + e ), the size of the non-light-emitting area (or light-proof part) can be minimized, thereby improving the light-emitting efficiency and/or light transmittance.

In addition, in the present disclosure, multiple light-emitting parts and light-transmitting parts are provided to minimize the size of the non-light-emitting area (or the non-light-transmitting part), so that the light-transmitting part (or the sub-light-transmitting part) can be further provided in each pixel to improve the transmittance.

In addition, in this disclosure, since the size of the red light emitting portion is larger than that of the other color light emitting portions, the user's perception of the degradation of the blue light brightness will be relatively reduced, thereby eliminating the difference caused by the degradation of the blue light brightness.

In addition, in the present disclosure, since the size of the red light emitting portion is larger than that of the other color light emitting portions, the red light emitting area can be driven even at a low voltage, thereby extending the life of the red light emitting portion. The life of the red light emitting portion having a relatively short life compared to the other color light emitting portions can be increased.

In addition, in the present disclosure, since the size of the color light-emitting portion including the red light-emitting portion can be larger than the size of the common OLED, even if the user sees the background through the light-transmitting portion, the brightness of the image can be increased, thereby improving the visibility of the image.

In addition, in the present disclosure, since the sub-electrode for preventing the occurrence of common voltage drop can be arranged in the sub-transparent part, the light transmittance of the transparent part can be further improved.

In addition, in the present disclosure, since the sub-electrode contact portion of the sub-electrode is provided for every two pixels, the light transmittance can be improved compared to the case where the sub-electrode contact portion is provided for each pixel.

In addition, in the present disclosure, since the plurality of sub-electrode contact portions are arranged in a zigzag pattern, the visibility of the background and/or image can be improved compared to the case where the sub-electrode contact portions are arranged in a row.

It is obvious to those with ordinary knowledge in this field that the above disclosure is not limited by the above embodiments and drawings, and various substitutions, modifications and changes can be made to the disclosure without departing from the spirit or scope of the disclosure. Therefore, the scope of the disclosure is limited by the attached patent scope, and any changes or modifications derived from the meaning, scope and equivalent concepts of the patent scope shall fall within the protection scope of the disclosure.

EA, EA1~EA3: Luminous area

NTA: Non-transparent part

P: Pixels

SL1: First signal line

SL2: Second signal line

SP, SP1~SP4: Light-emitting part

STA: Sub-translucent part

TA1: light-transmitting part

Claims (29)

A transparent display device comprises: a substrate, on which a plurality of pixels are arranged, wherein the pixels have a light-transmitting portion and a plurality of light-emitting portions emitting light of different colors; and an opaque portion, arranged between the light-transmitting portion and the light-emitting portions and between the light-emitting portions on the substrate, wherein each of the light-emitting portions comprises a first sub-light-emitting portion and a second sub-light-emitting portion having the same shape and size and spaced from each other, the opaque portion comprises a first opaque portion and a second opaque portion, the first opaque portion is adjacent to a plurality of short sides arranged in a first direction in the first sub-light-emitting portion and the second sub-light-emitting portion, and the second opaque portion is adjacent to a plurality of short sides arranged in a first direction in the first sub-light-emitting portion and the second sub-light-emitting portion. A plurality of long sides arranged in a second direction intersecting the first direction are adjacent to each other, the short sides of the first sub-light-emitting portion and the second sub-light-emitting portion include a first short side connected to one side of the long sides and a second short side connected to the other side of the long sides, the long sides include a long side of the first sub-light-emitting portion and a long side of the second sub-light-emitting portion, the long side of the first sub-light-emitting portion includes a first long side connecting one side of the first short side of the first sub-light-emitting portion and one side of the second short side of the first sub-light-emitting portion, and a second long side connecting the other side of the first short side of the first sub-light-emitting portion and the other side of the second short side of the first sub-light-emitting portion, The long side of the second sub-light-emitting portion includes a first long side connecting one side of the first short side of the second sub-light-emitting portion and one side of the second short side of the second sub-light-emitting portion, and a second long side connecting the other side of the first short side of the second sub-light-emitting portion and the other side of the second short side of the second sub-light-emitting portion, and the first light-proof portion and the second light-proof portion are provided to satisfy the following formula: A: 2B = (a + b): ( c + d + e ) wherein A is the length of the long side of the first sub-light-emitting portion, B is the length of the short side of the first sub-light-emitting portion, a is the length of the first short side of the first opaque portion adjacent to the first sub-light-emitting portion in the second direction, b is the length of the first opaque portion adjacent to the second short side of the first sub-light-emitting portion in the second direction, c is the length of the second opaque portion adjacent to the first long side of the first sub-light-emitting portion in the first direction, d is the length of the second opaque portion adjacent to the second long side of the first sub-light-emitting portion or the first long side of the second sub-light-emitting portion in the first direction, and e is the length of the second opaque portion adjacent to the second long side of the second sub-light-emitting portion in the first direction. A transparent display device as described in claim 1, wherein the light-emitting portions include a first light-emitting portion, a second light-emitting portion, a third light-emitting portion, and a fourth light-emitting portion, and the first light-emitting portion is provided to have an area greater than each of the second light-emitting portion, the third light-emitting portion, and the fourth light-emitting portion. A transparent display device as described in claim 2, wherein the first light-emitting portion is provided as a red light-emitting portion that emits red light. The transparent display device as described in claim 1, wherein the opaque portion includes: a common opaque portion disposed between the light-emitting portions; and a non-common opaque portion disposed between the light-emitting portions and the light-transmitting portion, wherein each of the first opaque portion and the second opaque portion is the common opaque portion or the non-common opaque portion, and the width of the common opaque portion is wider than the width of the non-common opaque portion. A transparent display device as described in claim 4, wherein the light-emitting parts include a white light-emitting part and a plurality of color light-emitting parts, the non-shared opaque part includes a first non-shared opaque part and a second non-shared opaque part, the first non-shared opaque part is disposed between the white light-emitting part and the light-transmitting part, the second non-shared opaque part is disposed between each of the color light-emitting parts and the light-transmitting part, and the width of the second non-shared opaque part is wider than the width of the first non-shared opaque part. A transparent display device as described in claim 5, wherein the common opaque portion comprises: a first common opaque portion disposed between the color light-emitting portions; and a second common opaque portion disposed between one of the color light-emitting portions and the white light-emitting portion, and the width of the first common opaque portion is equal to the width of the second common opaque portion. A transparent display device as described in claim 6, wherein the color light-emitting portion includes a red light-emitting portion, a green light-emitting portion, and a blue light-emitting portion, at least a portion of the red light-emitting portion overlaps with each of the green light-emitting portion and the blue light-emitting portion in the first direction, and the white light-emitting portion is arranged to be adjacent to the green light-emitting portion in the second direction and is arranged to be adjacent to the light-transmitting portion in the first direction. A transparent display device as described in claim 5, wherein the color light-emitting portion includes a red light-emitting portion, a green light-emitting portion, and a blue light-emitting portion, and the width of the red light-emitting portion is equal to or narrower than the sum of the width of the green light-emitting portion and the width of the blue light-emitting portion. The transparent display device as described in claim 7 further includes a sub-light-transmitting portion, and the sub-light-transmitting portion is arranged between the red light-emitting portion and the light-transmitting portion. A transparent display device as described in claim 7, wherein the width of the second non-shared opaque portion disposed between the red light emitting portion and the transparent portion is smaller than the width of the first shared opaque portion disposed between the green light emitting portion and the blue light emitting portion. The transparent display device as described in claim 9 further includes: A common power line, which is arranged to overlap with the red light emitting portion in the first direction; and a sub-electrode, which is connected to the common power line and arranged in the sub-transparent portion. A transparent display device as described in claim 11, wherein each of the light-emitting portions comprises: a pixel electrode disposed on the substrate; an organic light-emitting layer disposed on the pixel electrode; and a pair of side electrodes disposed on the organic light-emitting layer, and the pair of side electrodes are electrically connected to the sub-electrode in the sub-light-transmitting portion. A transparent display device as described in claim 11, wherein the sub-electrodes are alternately arranged in a portion of a plurality of pixels arranged in the first direction and/or the second direction. A transparent display device as described in claim 13, wherein the sub-electrode is zigzag-shaped in the first direction and/or the second direction. The transparent display device as described in claim 1, wherein the light-emitting portions include a white light-emitting portion and a color light-emitting portion adjacent to the light-transmitting portion, each of the white light-emitting portion and the color light-emitting portion includes the first sub-light-emitting portion and the second sub-light-emitting portion, and the first sub-light-emitting portion and the second sub-light-emitting portion are connected to each other through a repair line. A transparent display device as described in claim 15, wherein the light-transmitting portion is arranged adjacent to each of the white light-emitting portion and the color light-emitting portion at different positions, and the repair line is arranged in the light-transmitting portion. A transparent display device comprises: a substrate, on which a plurality of pixels are arranged, wherein the pixels have a light-transmitting portion and a plurality of light-emitting portions; and an opaque portion, arranged between the light-transmitting portion and the light-emitting portions and between the light-emitting portions on the substrate, wherein each of the light-emitting portions comprises a plurality of first light-emitting sides arranged in parallel and a plurality of second light-emitting sides respectively connected to the first light-emitting sides, and the opaque portion comprises a plurality of first opaque portions respectively adjacent to the first light-emitting sides and a plurality of second opaque portions respectively adjacent to the second light-emitting sides. The light-transmitting portion includes a first light-emitting portion, a second light-emitting portion, a third light-emitting portion, and a fourth light-emitting portion, and the first light-emitting portion is provided with an area greater than the area of each of the second light-emitting portion, the third light-emitting portion, and the fourth light-emitting portion, and the first light-emitting portion is a red light-emitting portion for emitting red light. A transparent display device as described in claim 17, wherein the opaque portion includes: a common opaque portion disposed between the light-emitting portions; and a non-common opaque portion disposed between the light-emitting portions and the light-transmitting portion, each of the first opaque portion and the second opaque portion is the common opaque portion or the non-common opaque portion, and the width of the common opaque portion is wider than the width of the non-common opaque portion. A transparent display device as described in claim 18, wherein the light-emitting parts include a white light-emitting part and a color light-emitting part, the non-shared opaque part includes a first non-shared opaque part and a second non-shared opaque part, the first non-shared opaque part is arranged between the white light-emitting part and the light-transmitting part, the second non-shared opaque part is arranged between the color light-emitting part and the light-transmitting part, and the width of the second non-shared opaque part is wider than the width of the first non-shared opaque part. A transparent display device as described in claim 18, wherein the light-emitting parts include a white light-emitting part and a plurality of color light-emitting parts, the common opaque part includes a first common opaque part disposed between the color light-emitting parts, and a second common opaque part disposed between one of the color light-emitting parts and the white light-emitting part, and the width of the first common opaque part is equal to the width of the second common opaque part. A transparent display device as described in claim 19, wherein the color light-emitting portion includes a red light-emitting portion, a green light-emitting portion, and a blue light-emitting portion, at least a portion of the red light-emitting portion overlaps with each of the green light-emitting portion and the blue light-emitting portion in a first direction, and the white light-emitting portion is disposed adjacent to the green light-emitting portion in a second direction and is disposed adjacent to the light-transmitting portion in the first direction. A transparent display device as described in claim 19, wherein the color light-emitting portion includes a red light-emitting portion, a green light-emitting portion, and a blue light-emitting portion, and the width of the red light-emitting portion is equal to or narrower than the sum of the width of the green light-emitting portion and the width of the blue light-emitting portion. The transparent display device as described in claim 22 further includes: a sub-transparent portion disposed between the red light emitting portion and the light transparent portion; a common power line disposed in the first direction to overlap with the red light emitting portion; and a sub-electrode connected to the common power line and disposed in the sub-transparent portion. A transparent display device includes: a plurality of pixels, each of which has a light-transmitting portion and a plurality of light-emitting portions; and an opaque portion located between the light-transmitting portion and the light-emitting portions and between the light-emitting portions, wherein the light-emitting portions include a red light-emitting portion, a blue light-emitting portion, a green light-emitting portion and a white light-emitting portion, and the area of the red light-emitting portion is larger than the area of each of the blue light-emitting portion, the green light-emitting portion and the white light-emitting portion. A transparent display device as described in claim 24, wherein: the red light emitting portion is adjacent to both the green light emitting portion and the blue light emitting portion in a first direction, the green light emitting portion and the blue light emitting portion are adjacent to each other in a second direction intersecting the first direction, and the white light emitting portion is adjacent to the green light emitting portion or one of the green light emitting portions in the second direction. A transparent display device as described in claim 25, wherein the size of the red light emitting portion in the second direction is larger than the size of each of the green light emitting portion or the blue light emitting portion in the second direction. A transparent display device as described in claim 25, wherein the size of the red light emitting portion in the second direction is equal to the sum of the size of the green light emitting portion and the size of the blue light emitting portion in the second direction. A transparent display device as described in claim 25, wherein: The red light emitting portion, the green light emitting portion and the blue light emitting portion each include two sub-portions separated by the opaque portion and disposed opposite to each other in the first direction; and the white light emitting portion includes two sub-portions separated by the opaque portion and disposed opposite to each other in the second direction. The transparent display device as described in claim 28 includes a plurality of repair lines, and the two sub-light-emitting parts of each of the red light-emitting part, the green light-emitting part, the blue light-emitting part, and the white light-emitting part are connected to each other through one of the repair lines.